I think devs went too far with Geo and Utopion in terms of buffs.
Utopion unkillable without sleep or posion so dont waste your time trying to kill him once he get overwatch.
Geo they went too far with him. His ability to control the game is insane as he does everything. Stun immune, backstab to remove or setup monsters, ally substitute to repeat enterance effect such as motor or shocking+ having a protector and to top all of this bloodfury.
Well i dont think devs will change geo now as he was released more then once and people spent money trying to get him, deathgazer situation right here.
I suggested before and i will resuggest again that devs implant a compensation system to nerfs. My idea was when nerfs happen to limited time legendaries devs gives the players a option to keep or release the monster if they release the monster they get a special iteam that can be used to purchase a legendary of choice that way devs have more control over game balance and players wount be abset of their monster getting nerfed.