So, I'm just gonna highlight something about the AP Mana Regen changes.
So, let's look at Morello's: 100% Base Mana Regen vs. 400 Mana Standard AP Mage Base Regen is 6+0.8 per level. Lets say that we're level 9, which means we have our ult and typically our first main spell maxed. This puts our regen with current Morello at 13.2 per 5, or 158.4 mana per minute.
This means that for current Morello to provide more potential mana than new Morello, it takes **two and a half minutes. ** Also, any time your mana is full (I.e. walking to lane) current Morello becomes worse. To illustrate this, new Morello gives me enough mana to shoot 4 rank 5 Ziggs Q's in 8% of the time it takes to cast that many with current Morello's regen.
Additionally, flat mana has scaling with numerous mechanics, including but not limited to: The power of Seraph's
(whose upcoming new passive is both awesome and blows the regen it currenly has on it out of the water), the amount of regen Blue Buff gives (Blue Buff gives 25+2.5% of Max Mana per 5),and the amount that the Meditation Mastery gives (1.5% of missing mana in chunks every 5 seconds).
Something most forget is that the more mana you have (and, therefore, the longer it takes the flat costs of spells to drain your bar), the more time the regen you do have has to do its thing. If it takes me 5 full rotations to go oom versus 2, I have more time to regen between rotations with the former than the latter, which is almost guaranteed to give me more overall uptime unless my regen is absurd (which it really shouldn't be from a game health standpoint.)
This also is ignoring outliers with abnormally low base mana regens (see:
) who already don't benefit from Morello's regen much, if at all.
Now, other changes being proposed have issues (the Rocket Belt shouldn't exist, what even with Athene's), but Mana>Regen is nowhere near as catastrophically bad as some seem to think and continue to preach. The only time this ever really becomes true is later in the game, when natural mana and regen progression advance (while items with flat mana do not), but even then, mana in general is so much less of an issue that the difference between regen and raw mana is typically still very minor.
Tl;dr Flat Mana is better than regen in almost all cases earlier in the game bar significantly extended time frames, and the proposed changes to Mage Items favoring Mana>Mana Regen are not going to "destroy" mages.