As someone who has been obsessed with the Twilight Forest since I started playing with mods (a very, very long time ago), I disagree.True that. But still flying in the Twilight Forest lets someone avoid a lot of the fun traps and puzzles which takes away a bit of the point of many of these boss monsters.
Edit to add: Flying anywhere allows you to avoid monsters and dangers.
Eh, crafting recipes don't always create balance, and often times an expensive crafting recipe is just a cheap way out. Also, if the 3x3 grid is restrictive, why not just make a crafting table that is bigger?I suppose part of the issue could be the crafting recipes too. 8 planks in a box shape makes a chest, makes some sort of Minecraft sense, and various ingots/components make a machine, but if that recipe doesn't include some sort of motor (or even a piston...), or some sort of circuit/control board (comparator?), how does it do the "magical" stuff like auto-eject? Other mods are worse for this, as mentioned by someone else earlier.
Sure the 3x3 grid is restrictive when trying to make recipes, it's difficult to get a good middle ground, with either insanely cheap like CC, or insanely involved like GregTech. Both extremes of the scale appeal to players.