Im someone who like the new changes mostly.
The only thing where i changed my mind a bit over the days is the spellspeed. Ok, i have 1,88 ct in average, maybe i am a bit faster. But it feels now truly a bit to fast with the casting.
I like the faster speed visually and for mechanics, where you has to move a lot or has little casting time. In addition was the blm a bit slow previously.

But after the few days has i noticed, that he shoot his big spells a bit to fast. And has a differently feeling now. Maybe, they could change the speed to the middle of the old one and the new one.
In addition feels leyline to short now. I understand it. But it feels weird, because you has barely the time now, to resummon it or move back to it, should you had to move earlier.

The big + points is still the removing of the timers (where a increase to 20s could maybe had worked to). Because, you can now wait in your rotation, until the down time is over.
In overall do i like the new Version. But start to understand a bit the people who want it slower down to.