First of all, let me preface this thread by saying that I am eager with anticipation for the changes, and am currently in the process of updating my PBE to be able to try it.
That being said, I fail to see how these changes are managing to upset anybody. I understand that it takes different strokes for different folks, but lets take a look at some of the things that have already been confirmed to have been fixed in the upcoming change.
1.) Turret ranges are the same now. No longer will the days of "That tower shouldn't have shot me from that far away" be upon us. It was very frustrating, especially with the top two outer turrets, as those two had VERY different ranges.
2.) Champion balance and blink champions getting the finger is a GOOD thing. How often have you lost simply because you couldn't ever manage to actually gank the other team because they just jumped over walls every single time they got low? Champions like Tryndamere, Gragas, and Lee Sin were some of the most irritating champions to play against because on Treeline they were basically completely immune to ganks. This opens up a lot of opportunity for other comps to actually work in competitive Treeline, which I assume is what the goal of this remake is.
3.) No more turtling. In the really big thread, they've confirmed that they're adding a wall between the healing pad laser and the minion path, meaning that teams can't turtle for decades by pulling minions into their pool. This is good, I get tired of teams that have very obviously lost a game wasting twenty extra minutes as they turtle up in their base, healing away any harass you put on them while keeping you off of their nexus just based on the sheer amount of free exp they're getting from the minion waves.
4.) No more flashing over the wall to kill the Nexus. Nothing is more frustrating than losing a really close game because the other team had flash and you didn't. This is another scenario where turtling is super annoying, because against teams that turtle really hard, this is often the only real option if you plan on winning. This is a very scummy thing to have to do, but sometimes its the only option, and I'm glad that this and the last one are being addressed.
5.) From the sound of things, you can actually get away with playing things that aren't bruisers on the new Treeline. I don't know if this is because of the new objectives, or just because the map is going to have less choke points, but as they made it sound, playing an attack damage carry may be viable, which is exciting.
All in all, these changes are really not doing any harm, unless the harm is that you can't play your OP flashing bruised to get a free win anymore. Many of us more serious players are excited because it promises to open up a lot of things that weren't previously viable.