This is blatant misinformation.
HW had the same number of skills, typically, as now. ARR had fewer.
Here's the ARR WHM kit, for instance:
- Stone (unused outside of T5)
- Stone II
- Aero
- Aero II
- Holy
- Regen
- Cure
- Cure II
- Cure III
- Medica
- Medica II
- Benediction
- Raise
- Shroud of Saints
- Divine Seal
- Presence of Mind
- Protect (literal bloat)
- Cleric Stance
- Stoneskin
- Repose
- Swiftcast
- Virus (and it granted a 70s immunity debuff after usage back then)
- Eye for an Eye
- Blizzard II (useful only in Garuda Ex, though that was usually covered instead by Shadowbind, and in certain weird T4 prog strats)
- Surecast (which then lasted only 3s and was cancelled by completing any cast and didn't yet grant KB immunity)
25 abilities. We currently have... 30 abilities (24 native, not counting any upgrades, plus 6 Role Actions).
Heavensward added Assize, Asylum, Tetra, and Aero III (Stone III just replaced Stone II) for 29.
You
could only take 5 of them. Only casters have so few Role Actions.
The only way for you to have "5 bars full of stuff in HW" was for you to have crammed it up chalk full of macros, likely for job/gear swapping. Even AST, with Sprint, potion, and a macro each for Undraw and Royal Road cancel, fit on 3 bars (<36 skills) at that time.