Not really, the Spear is good but its main purpose IMO was to eliminate the fishing that ASTs had to constantly do. It makes the card system more fluid. But saying that it gave AST a net gain over losing their old Balance is just silly. That one card gave them a guaranteed spot everywhere and was overpowered as hell. The changes to ASTs card might make the gameplay more fluid, but numbers wise is a flat out nerf. Reminder, the first card was never RNG and would always be the most impactful lining up with everyones buffs/openers.
As for your second point, I'd say that's a subjective argument. Personally I hear about this "speedrun meta mindset" and then things like "kicked for not DPSing as healer" on the forums literally everywhere and have yet to encounter it in game ... ever. Now I'm not directing this at you, but I feel like people who use those arguments for why they weren't picked need to look at themselves before they blame the job they are playing. WHM pre 4.0 had many issues, those have all been addressed bar utility. However, as I said before, giving them utility creates imbalances with other jobs (mainly AST), and then you put AST in a bad position. The balance is still good, there's no need to throw a wrench in it.