Back to the WGPL's:
- What works "Best" and under what situations is that "best" considered to be said "best"?
- Are Thunder Hammers a solid replacement?
- Are Storm Shields worth it on a PA 1 Wound model? Likely not, what else might work instead?
- If I am using mainly Rhinos for my Grey Hunter packs, what is a solid all rounder loadout?
A few thoughts on WGPLs. I am so, so, fortunate that I modeled most of my WGPLs with Combi-meltas and Thunderhammers back in 5e. Those were decent back then, but they're awesome now. You just can't beat a Combo-weapon, since it essentially now an extra special weapon that you can put in every pack. I can see absolutely no reason whatsoever not to have a Combi of one form or another on every WGPL in your army. As everyone knows, with high-Strength and high-Damage, special weapons are the go-to workhorses for anti-vehicles and anti-monstrous creatures, and anti-Characters now, too. I'd go with either Combi-Plasma or Combo-Melta - both really have their uses. I'd never go with Combi-Flamers - they don't give you anything above and beyond what you'll already be getting with Boltguns or pistols and your Chainswords. D6 auto hits just isn't worth the bother, and certainly not the opportunity cost of missing out on, say, a Combi-Melta that can threaten everything in the game.
Now that you get to pick your own casualties, I don't see any reason to put a Storm Shield on a 1 wound model. It just isn't worth the investment. Just apply wounding hits to your "meat shields," and load your WGPLs up on offensive weaponry (like those Combi-weapons).
For the close combat weapon, I really like the Thunderhammers. It's a -1 to hit, but a flat 3 wounds in Damage, so you'll average 3 wounds to something every Fight phase (more if you have a nice buff aura nearby). Like Melta, Thunderhammers are a legitimate threat to everything in the game. If I were an enemy Character, I would never hesitate to get into a fight with a pack with a Power Axe, but you bet I'd hesitate to charge in if I see they've got a hidden Thunderhammer in the unit. Give the GHPL or BCPL a Power Axe, but give the WGPL a Thunderhammer. I'd only use a Power Fist on them if you've already got them modeled and painted, and can't be bothered to swap them out. Otherwise, there is no reason to go with the d3 Damage weapon, when the 3 Damage weapon costs the same; they could raise the price by 5 points, and the hammers would still be the better choice.
I have all my GH packs with 1 Meltagun; I need to get more models to be equipped with MG's, two per pack. I hear Plasma is worth it, I just don't like what rolling 1's will do. Is Str 7 all the time worth a Plasmagun still?
Plasma is still good. It is really, really, good, if you maintain a re-roll to hit buff aura for the unit, where you can Overcharge at your leisure. I would otherwise only Overcharge in a dire emergency, when I figure I'm going to lose the model in the opponent's next turn anyway. Even when you don't overcharge, Plasma is still worth the points, for the high-Strength and decent AP value. They'll certainly help you mow down heavy infantry, and help knock off the odd wound or two against vehicles, etc. I've got two 6-man packs of Hunters with a Plasma gun each, and I've got two Combi-plasmas on my WGTDA pack. I also have lots of Plasma pistols spread throughout my army, and need to build two more basic Hunters with Plasma pistols.
However, Melta is my go-to special weapon of choice in my Hunter packs, since they can threaten anything in the game. They'll be fighting up close anyway, and can now split fire with no restrictions, so having the Melta is never a waste.
Anyway, these are a few of my thoughts on your questions. Great topic, by the way. Hope it was helpful.