I was a die hard IC fan as soon as I met the mod and back in the day my minecraft experience was basically IC & BC since those were the main mods the game had. However the mod had a lot of down times in development and was picked up and continued by different people. In the previous version it looked like a bundled mess, all patched up trying to do many things at once while providing convenience. You guys remember beta when you couldn't stack food? If you wanted to carry around 4 bread you had to put them in 4 different slots, so IC gave us a canning machine which made stackable food from bread. Those features still remained even though they were outdated, whoever picked up the mod didn't bother changing or remaking it but just added their own ideas and recipes and processes to these essentially useless machines. Has anyone ever made a fuel powered jetpack? No. Its a piece of crap even if you make it and fuel it, it doesn't even fly properly as the electric one does.
So I just got into IC2 experimental the other day.. I can see that there trying to modernize the mod, get rid of some of the junk while improving mechanics, but its extremely tedious to play with the mod, it just isn't fun anymore. I hate crafting in this mod with a passion! Here is a fictional comparison of making a machine in IC2exp vs making a machine in TE, lets say both machines require exactly the same amount of resources.
TE: Make a machine core (tier 1 recipe, meaning its just basic resources to make), slap on some ingots and materials in a certain pattern > boom machine made.
IC2: Make a machine core.. but for that we first need to make a hammer and a wire cutter that take 5 iron each and create about 3 machines before they break, smash the iron with the hammer and get 1 iron plate, smash some tin now for the tin plate and then again for the half plate things. Now take those 2 and some redstone and make the machine core, next up you need.. surprise! more tin half plate so go though that double craft process to do that and oh you need 2 piece of copper wire too so make copper half things and cut them with wire cutters, which chest did I put those back into again? There you go now plug that machine right into a system that could blow it up with 0 return rate if you forgot to be careful. Oh you want another machine?
Each time you craft it puts you through a tedious time wasting and annoying process where in the end you still spend the same 10 iron but with a bunch of copper+tin mini craft processes in between, so you're constantly running all over your inventory all the time trying to get 1 stupid piece of copper you forgot because you need to make a little copper bearing with it and stick it in the side of the recipe.
I like TE a lot, I just don't like the energy generation as it relies on other mods' machines also once you have a TE setup there's practically no need to change anything as there are no expanding or upgrading options and you just don't make any more machinery which is a bit sad

. I wish Builtcraft would remove all those engines & the quarry and we can just keep the dynamos and maybe GT can make a clean, non world messing way for mining automation. Now I just want GregTech to go finish and go standalone so we can have a proper exclusively industrial based crafting mod. Eventually GT will have its own "electrical age" generation-usage like IC2 level wont be where you start, but the mid game point or your first big upgrade so you could have enough automation set up at that point (with AE ofc) to not make everything so tedious.
My general idea on the direction of mods:
Back in the day any other mod, not BC/IC, wasn't very big and generally added something like colorable ice cream & cones. Being so focused on these mods today make us miss out on a lot of other good mods out there that do what this mod does but better. There are however still problems, everyone now it seems is trying to push out their own version of energy production and ore processing. I also hate how mods try to branch out in every direction now. Guy makes mod that adds extra apples and pears to grow on trees, next version we get there's a new ore that does something. This screws up the world generation and as these mods stack up you just see crap everywhere and it gets annoying. When I'm mining I want to focus on getting ores and minerals and not get distracted by these magical ores and neon glowing crystals. All of these things also provide inconvenience to use texture packs as their textures are missing, now I just use Faithful since its defaultx2 so anything untextured is just slightly blurry and not something completely different.