I think that these will just cause complications. Logistics pipes for example makes automation easy, which isnt how automation works it's supposed to be giant machines that take alot of work to make so its easy to do whatever you want afterward, But with logistics pipes it makes it too easy to automate shortening the time between the moment you start using them to the late game.
Advanced machines... Alblaka made overclockers for a reason.
Flat bedrock would mean we would need a new map
(which the above would really piss me off since it took me 3 minecraft sessions making that mechanical sky whale)
Compact solars may reduce server lagg however, if you really need that much energy you could have just setup a lava pump in the nether and make a giant geo gen machine which will last till the server updates and get's a new map for the new minecraft version.
These are my reasons why these mods shouldn't be added.