I think it's safe to say that 9th edition has turned into a bit of a disaster. Elements that were improved from 8th have been superseded by an absolute tidal wave of groxdung and power creep that, coupled with the ADHD tier release schedules making it borderline impossible to have any kind of long-term hobby plans, sucked the fun out of the game.
Now I'm pretty sure we'll be due a new edition eventually, assuming GW doesn't go belly-up or decide that instead of doing new editions they're just keeping 9th indefinitely and just continually making new versions of the Codices to extract more money from us. So the question is, what could be done with a new edition to fix the game?
Here's my personal list of ideas/what I'd do if I were magically granted control of GW:
>Hard reset again. No Codex carry-over, do the 8th "index" solution to tide everyone over to start with.
>Try and combine the best elements from both "traditional" (7th and before) and "new" (8th-9th) rulesets. Notably bringing back USRs to some degree (not 7th levels of billions of special rules mind) and a damage table where not everything can damage anything (especially re: vehicles).
>Speaking of vehicles, they'd get a huge overhaul to make them worth taking (and actually feeling like vehicles) whilst not being too powerful. In practice this means the base rules are much the same as now, but with added rules for armour and the aforementioned return of the proper damage table, they should be far more survivable. To compensate for this and to avoid them dominating the game (and also because I never liked tanks being able to shoot their sponsons through themselves) bring back the rules of weapon arcs and the actual shape of the tank mattering.
>Datasheet bloat would be tackled by returning to having one sheet with multiple options rather than a separate entry for every single wargear permutation.
>This would also carry over to Legends, which would be overhauled and a lot of the current entries being made into upgrades for existing Codex units, so rather than having a Captain on a bike being a totally separate unit with incompatible rules, it would just be an upgrade for the Codex entry, meaning they'd be far more viable and far less divorced from the main army.
>Speaking of extra-Codex units, Forge World units would start with an Index like we have now, but would get proper updates alongside Codices via the triumphant return of Imperial Armour! This would keep them separate from mainline Codex units (and avoid the 'dexes themselves being overly bloated) but would make FW units far more viable, and also would allow for extra optional rules and fluff besides just resin tanks to be introduced.
>These books could also include something similar to the Age of Sigmar Anvil of Apotheosis, and allow for the creation of custom characters. They clearly haven't abandoned the idea seeing as an update to it was included in the latest AOS expansion after all...
>Drop the ridiculous anti-conversion stance and allow for options not explicitly in the box onto a datasheet. There's no reason that a Hive Tyrant can no longer take Devourers when FW used to produce arms for it to do just that, for instance. Plus, let's be real, I reckon GW has lost more sales from people getting sick of this (and the prices but that's another story) and just buying recasts/complete non-GW minis than ever they would have from bitz resellers or 3P conversion parts.
>Only release new books with actual worthwhile content in them. Expanded rules for special theatres of war (Planetstrike, Cities of Death etc)? Sure! £30 to invalidate the points values in the Codex? No thanks.
>Abandon the idea of tying points to Matched Play, and make it clear you can play any game with points or PLs (which I'd keep around for the sake of beginners who just want to learn the ropes). This would hopefully encourage people to actually try different scenarios.