I haven't seen anywhere that said that the AI never used the planetary wheel. Perhaps you know more on that than me.
Clearly I do, yes, since it's been mentioned a lot by both Stardock and the community over the past four months. Also, notice how badly the AI plays; it's terrible research, econ and manufacturing scores. That's because it can't specialize for toffee. It uses global wheel settings that are set in the strategy definition files, and it makes no effort to min-max these in the short term either - they're just fixed values that are used for 30+ turns at a time.
But you can use the planetary wheel to micromanage your planets in a way that gets you small gains (get that ship/research one turn early with no noticeable decrease elsewhere). It's annoying to do, as a human. Especially if you're dealing with dozens of planets. But as an AI? It's easy. It's the sort of easy bread and butter that AIs are very good at.
Yes, it's exactly the sort of thing that allows an AI to compensate for being otherwise not very good at the game. As in, precisely what the AI really, desperately needs right now if it's going to challenge experienced players. As I've written elsewhere on these forums, you can even adjust the difficulty settings so that it micros on set numbers of worlds to increase with difficulty level.
See, personally I don't bother to micro the wheel that much - I have like 3 basic settings, 100% manu, 90%research 10%manu, and 90%econ 10% manu. I can't be bothered to micro more than that, and I never really need to. The AI can't even do that, and so by about turn 200 I massively outnumber AND outclass it. The AI's never going to be able to match my ships pound-for-pound, so it really needs to be able to out-produce me to stand a chance. The fact that it cannot do so, even when my total sum micromanagement involves visiting a planet twice in the whole game (first time to set 100% manu and queue up buildings, second time to set it to whatever it ought to be doing) makes it pretty obvious that the AI isn't doing any micro on that level whatsoever.
If the planetary wheel *isn't* being used by the AI, it's because it's a known easy exploit.
As outlined above, the wheel isn't used by the AI, and it has nothing to do with it being an easy exploit. It's because it's much quicker and easier to not bother coding the AI to do so.
That said, if there's such a vocal contingent of wheel love, putting a game option in to have a wheel or no wheel seems like a pretty easy thing to do considering it's implemented already.
Yes, you'd think just leaving it in but deactivated so we can mod it back in (as it was in 1.3 opt-in 1) would be easy. I'm not sure why Stardock are so militantly against that, tbh.