Reasoning for removal of TP, but not MP?

[MistakeNot]

Don't just say something without providing evidence of some sort.

TP got removed, which results in any TP class being able to spam their AoE spells all the time, which wasn't possible before.
Using that as a base it makes no sense why any AoE spell on a MP class still cost resources, right?

If the scope was to enable AoE spamming you would grant it both groups, TP and MP classes, and not just TP classes.

Most of the caster classes already could spam AoE abilities just fine. Spamming of AoE abilities is not the issue.
It is mainly healing that is limited by MP. For anything else running out of MP/TP is/was almost never an issue.

[Millybonk]

Most of the caster classes already could spam AoE abilities just fine. Spamming of AoE abilities is not the issue.
It is mainly healing that is limited by MP. For anything else running out of MP/TP is/was almost never an issue.

Do you actually believe that?

A test for you then:
- You as healer, a tank and 2 other TP classes at a level, when you as healer have access to a spammable AoE spell, e.g. lvl 45 as WHM to get Holy
- Tell the tank to go at an aggressive pace, but slow enough for you to have plenty of time to dps
- Cast your healer AoE-spam ability as much as possible in an attempt to keep up with the now permanent AoE-spamming of TP classes without letting anyone die
- Come back to me how long you were able to keep the AoE spamming up without neglecting healing due to AoE abilities for MP classes still costing resources

[MistakeNot]

Do you actually believe that?

A test for you then:
- You as healer, a tank and 2 other TP classes at a level, when you as healer have access to a spammable AoE spell, e.g. lvl 45 as WHM to get Holy
- Tell the tank to go at an aggressive pace, but slow enough for you to have plenty of time to dps
- Cast your healer AoE-spam ability as much as possible in an attempt to keep up with the now permanent AoE-spamming of TP classes without letting anyone die
- Come back to me how long you were able to keep the AoE spamming up without neglecting healing due to AoE abilities for MP classes still costing resources

Yes, I believe it. Of course, that is based on experience from actual dungeon runs rather than contrived tests that do not match how people actually play.

Your proposed test is pointless because it misses one very fundamental point: The main role of healer isn't to do damage, but to heal. Damage is what they do when and if they have time and resources left to do so. Or in other words - healers aren't supposed to spam AoE attacks all the time because that isn't their job, while it is perfectly reasonable to for DPS classes to do so - attacking is their main responsibility.