Why is the healer class basically a one spell dps class?

[Azbroolah]

I mean for all the complaints of AST card changes most AST just balance fished anyway. So this new system is now all balance cards.

This is true to an extent, but only because the other cards were really just not very good most of the time. Balance and Spear (after it was changed to crit) were just straight-up better than the other choices. Spire was basically a dead draw (Royal Road/Minor Arcana fodder only), Ewer was only very situationally useful (making it also Royal Road/Minor Arcana fodder), Bole was not possible to intelligently play around (because if you need mitigation you need it on-demand, not RNG), and Arrow was actively bad for most classes other than BLM because it resulted in misaligned burst windows. AST players weren't Balance/Spear fishing because of "elitism" (whatever that means), but because it was the only choice that made sense 99% of the time.