I, and most of my friends, exclusively enjoy Turbo games since it was released, because it is just faster and goofy, but after updates upon updates, the game balance broke, and games went from averaging 20-25 minutes per game to 30, with games sometimes reaching 1 hour!. I don't know how to make a fancy list, but the mode itself needs balancing and here's a small list of problems..
- Heroes like Nature's Prophet are able to kill the tier 1 tower before creeps even spawning because of how weak towers are, the backdoor is also so easy to overwhelm if 2 heroes attacked a backdoored tower.
- Some items don't make sense with their timers like the raindrop being only purchasable after min 5 where heroes are already level 10 or so.
- One of the reasons games are getting too long because of the fact that one teamwipe can turn the tides entirely and lead to about 10K Networth boost to the losing team as well as levels upon levels gained if they win the teamfight
- Roshan spawns WAY too often!
- Boots of Travel CD is too low! normal TP being 40 CD is already enough.
Of course, there are more stuff that need balancing, but these are the ones causing the biggest problem leading the games to be longer than 30 minutes.
Source: https://www.reddit.com/r/DotA2/comments/z9w7kt/i_know_turbo_is_for_fun_and_nothing_serious_but/