Giving all characters (regardless of class) a series of bonus actions they can use makes sense for a video game. Players new to DnD would otherwise be really confused as to why there is an action point they are unable to use each turn, it gives you more options and will make combat engaging.
Also some of these abilities would probably never be used unless they were bonus actions. When would you choose to throw your boots at an opponent if doing so meant you couldn't swing your sword or cast your firebolt.
Will need to be balanced effectively, but that will come with time and playtesting.
Giving everyone the hide, dash or disengage option as a bonus action removes the point of the rogue having the Cunning Action feature (it specifically allows you to do these things as a bonus action). If you do that you might as well let everyone get other things such as second wind, you know, coz "it's fun". The bonus action is supposed to be exactly that - a small, bonus thing you do during your turn that may help if used well. The features that allow you do different things with your bonus action set the classes apart and gives a different feel to playing each individual class. Making all classes the same is just removing a good part of the replayability of the game.
On the topic of boot throwing: it's the same as in actual D&D - almost nobody ever does it except when they're fooling around/making a point because it's sub-optimal. They're adding it to make you feel like you have choices (which is nice) but even in the tabletop version taking the piss costs you something. I don't see why this should now be free. Also, if you get to do silly things like throwing boots at your opponent every round it becomes less of a "silly thing" and more of a "real combat tactic" which is beyond ridiculous and removes the fun from doing these things in the first place.
