I haven't played with RotaryCraft yet since the modpack I'm currently playing doesn't have it, but the answer to the question is always the same for any mod:
The point of playing with any mod is the ability to do things in a style you like, and avoid spending time with things you don't like. For some that includes heavy automation and resource effiency to the point of being overpowered, for some it doesn't. For instance, in spite of its effienciency, I would never build a thing like Direwolf20's "UberMiner" since it destroys the landscape. On the other hand, I would highly appreciate a mod that gives me an easier way to get things I could usually only obtain with trading, like Mystcraft pages, since I love Mystcraft but find trading immensely annoying (any hints btw?).
I think that for almost everyone, there is a point where style matters more than power and efficiency, since you'll always end up doing things the same way otherwise. So if I'm going to play with RotaryCraft, or any other mod, will depend less on what it enables me to do - which in most cases other mods do as well - and more on *how* things are done. If things are more complicated for the same benefit as in other mods, that's not bad unless I dislike spending time with those mechanics. Building a fusion reactor and in effect not having to care about energy requirements any more, I don't know if that appeals to me, but other parts of the mod may do. It's all a matter of preference.
So, like for any other mod I haven't played yet, I'll say this: I don't know if I'll enjoy it, but if it's made well, technically, and if it has its own style, then it's good that it exists.
The point of playing with any mod is the ability to do things in a style you like, and avoid spending time with things you don't like. For some that includes heavy automation and resource effiency to the point of being overpowered, for some it doesn't. For instance, in spite of its effienciency, I would never build a thing like Direwolf20's "UberMiner" since it destroys the landscape. On the other hand, I would highly appreciate a mod that gives me an easier way to get things I could usually only obtain with trading, like Mystcraft pages, since I love Mystcraft but find trading immensely annoying (any hints btw?).
I think that for almost everyone, there is a point where style matters more than power and efficiency, since you'll always end up doing things the same way otherwise. So if I'm going to play with RotaryCraft, or any other mod, will depend less on what it enables me to do - which in most cases other mods do as well - and more on *how* things are done. If things are more complicated for the same benefit as in other mods, that's not bad unless I dislike spending time with those mechanics. Building a fusion reactor and in effect not having to care about energy requirements any more, I don't know if that appeals to me, but other parts of the mod may do. It's all a matter of preference.
So, like for any other mod I haven't played yet, I'll say this: I don't know if I'll enjoy it, but if it's made well, technically, and if it has its own style, then it's good that it exists.