Just a reminder...
If you don't want MultiBlock machines for end game machines, out of fear of upsetting a modder, YOU'RE DOING IT WRONG! You are now a member of the New Guard, if you are making a mod that isn't a remake of a old mod without much new content.
You are pretty much at war with the Old Guard, aka the people who made the old mods like IC2 and... well, BuildCraft mods. But mostly IC2 since Buildcraft is getting tons of new stuff since SpaceToad is back and thus RailCraft will have new stuff and Forestry will have new stuff. Assuming anyone picks up Forestry. And if not the multifarms, well, at least the bees!
...can't live without my bees...
So believe me, if you don't want to step on their toes, you have nothing you can add that is new. Don't just step on their toes, stomp them. Don't avoid using similar ideas to what they have, remake them in your image and improve them. Don't avoid conflict with them, show them that you are better then they are at their own game.
Tech mods have been done to death, and unless you have a utterly unique idea, there isn't much left to add that is new... so make the old ideas into BETTER ONES.
So this means making 3d Models for tools, even if you aren't the best at it. Minecraft is a weird game in that it's objectively not great looking, pretty much by design, so you don't need to worry too much if something looks great, only if it visually shows what it does. Tools, I mean, have to do that. A device for breaking blocks will look like something you use for those blocks. Drills for stone, ores, and dirt and whatnot. Saws or axes for trees, etc etc.