I did consider that but the Bolt rifle is only 6" less than the Stalker bolt rifle and gives you a way bigger advantage at 15" or less while still letting you move&shoot without penalty. It's simply the more versatile weapon, especially on such a small board.
Also it's rather unlikely that you want to use the grenade with someone without AGL since at that range you're also in short range for any of your Bolter weapons while the AGL carry with his 30" range often is the one last ending up in short range his Bolter weapons (even with the Stalker bolt rifle).
6" shorter range means a -1 at a lot closer range than it does for the Stalker. And you may have completely missed my point about the grenades, but it seems like you're operating on the premise that the guy with the AGL can target the entire board at any time. Sometimes your close-up troops may need to throw a grenade - and if the only guys that are ever doing that are the one or two troopers with an AGL, what's the point of everyone having grenades?
You have to ask yourself what the role is of the guy with an AGL. Is he a shock trooper, designed for close assault? Probably not - why would you need a 30" range for his grenades? Clearly the AGL is a tool designed to lob grenades from a distance - and since it has no range penalty, it makes no difference at all if it's from 12" or 30". That was my point. Considering that, might as well put it on the guy who can do something useful in the event that someone else might want to use a grenade (you know, like your Reivers when they want to shock the troops they're assaulting?)
"a lot closer range" is pretty exagerated, The difference is exactly 3" for short range between both weapons and in Kill Team you get really quickly within the 15" required for the Bolt rifle. At that point you have two AP-1 shots vs one AP-2 shot. I for one know what I prefer.
And no I didn't miss that point of yours, I just prefer to keep my team more or less together so they can support eachother and the AGL is mobile enough to always have LoS to at least something so if I get this close enough to throw a grenade to the enemy with one of my front line guys then that front line guy is also within short range for his Bolt rifle etc. and doesn't really need to throw a grenade anyway while the AGL guy can still shoot with the superior AGL from further away without having to rely on the worse Stalker bolt rifle. He doesn't have to see everything, it's enough if he can see ANYTHING because at short range Bolt rifles aren't that much worse than Krak or Frag grenades while at long range the AGL is simply better than any basic Bolter variant.
I know my AGL carrys role pretty well. He's my long range fire support and for long range he uses the AGL so he wouldn't use the Stalker bolt rifle anyway. In the unlikely case he can't use his AGL the Bolt rifle is still good enough at long range at 30" while being better than the Stalker at short range which is barely shorter at 3" difference. Really, it never happened in any of my games so far except for that one time where he had a bunch of to hit penalties and I prefered having more shots with the Bolt rifle over the better strength and damage of the Krak grenade and the unreliable amount of shots of the Frag grenade with worse S and AP.
Your whole point seems to be about what you do when hits the fan and you assuming the Bolt rifle being not long range capable. Don't forget that the Bolt rifle is almost the same as the Stalker bolt rifle. 30" on such a tiny board is huge and since you can move&shoot without penalty you can position yourself much better. The only real drawback is having AP-1 instead of AP-2 but on the other hand you get an additional shot at short range which you end up in pretty much every game anyway at 15" unless it's some sniper fest where everybody tries to stay as far away as possible (what are objectives anyway lol).
Literally the only real reason to take a Stalker bolt rifle is the Masterful Marksmanship Tactic and only if you don't move because otherwise it doesn't give you an advantage at all and only serves to balance out one of the disadvantages. Hence why I'll put one Stalker botl rifle guy in my Primaris list on top of my AGL specialist. What you could do of course is giving the Stalker botl rfile guy an AGL as well if you have the point but he shouldn't be the first guy to fall back on to use the AGL, that's what you have the actual AGL carry for.
If my posts appear rude to you, I apologize. It's not meant to be rude in any way, it's just the way folks are in my country. It's really more about being direct than being rude. I know how it's perceived in the english speaking community and I already try to tone it down but I barely notice when it's too much since it's normal for me.
So yeah, I'm really not rude it's basically just cultural differences that act against me here. Again, I apologize.