Without these items mage would suffer, be out of meta.
Without it's grievous wound champions with huge lifesteal or spellvamp would probably make mage irrelevant.
Do you know the feeling of fighting a Mundo without ?
The feeling that none of your damage do anything to him?
Remember when 
was a mage item? it would give huge amount of mana regen + defensive option.
Bunnymap7 votesPeople want it to stop being a mandatory item for mages, and instead buff other items in compensation.
taleofsonata1 votesPeople want it to stop being a mandatory item for mages, and instead buff other items in compensation.
then they should bring back athene to mid laner, because supports don't actually build it.
LordGeovanni1 votessupports dont build it. athenes was built by supports more than mid laners before it was changed and now supports dont really want to build it but they are the only guys who can make use of it.
DragonShea3 votesPeople want a choice in first items they should get and also get able to delay a core items for a more strategically important item. that is issue that champs right now suffer from. I think that item building is becoming too rigged
AleksaTeemo2 votesPeople are not complaining about Morello,people are complaining about how much little diversitity with items.
BubblyRainbows2 votesYeah, the issues are the diversity of items. I mostly play mid/top, and generally speaking, I build the same six items, in the same order, almost every single game. With rare champions I might build one other item as an alternate, but it doesn't happen much. I'd like to see a few new items with different effects to give mages more options in lane.
KoKoboto2 votesThe ignorance here is...
[sg-poppy]
Teridax682 votesI think the point players are making is that Morellonomicon is a must-buy for pretty much any mage, and that AP itemization as a whole is too samey. Players don't want to go for the same build each time across multiple champions, and Morello's is the biggest symptom of that due to being rushed on pretty much every mage build. The problem highlighted in the OP is also the reverse: the early Grievous Wounds provided by Morello's is responsible for mitigating a lot of healing in-game overall, which has driven up a lot of healing, especially life steal and support healing, in order to still function in that environment. In the end, the problem is with those heals, which are too strong as a baseline precisely because they're expected to be halved by GW. In turn, this makes healing reduction all the more essential, which makes Morello's even more of a must-rush.
It's also worth noting that Morellonomicon is not itself a very well-designed item, as it gives pretty much everything a mage would want in good amounts, i.e. 100 AP, 20% CDR, Grievous Wounds and mana sustain in combat. As such, it combines a lot of different potential niches into a single, catch-all item, which is also why it attracts so much criticism. AP itemization hasn't really evolved much over time, even during the MYMU (and certainly not during the Assassin Update), and we've remained with the same limited pool of items for all AP champions, whereas AD itemization has broadened and diversified across multiple classes, while also becoming cheaper and more powerful. Equalizing power across mage items to create more competitive first picks, and coming up with more options for different classes would go a long way towards improving that, but as long as Morello's is worth several other mage items in terms of power and bonuses, that's not going to happen easily.
LordGeovanni2 votesDo you know the feeling of being mundo with a mage having morello where they burst your hp in 2 skills do it again 3 second later and you cant even use where your kits strength lies. Morellos does too much things fine keep the grevious wounds but take away the mana regen on kill 10 cdr and 20 ap you can still fuck over mundo then and morellos goes back to being the item it was before it got out of hand
FireDrizzle1 votesThe complaints about the cdr are ridiculous, AD champs have 2 items with 20% cdr 
and 1 with 30%
. Before anyone calls me a mage main I actually play tanks the most.