Wizards has been neglecting one of the greatest strengths of magic for a long time: diversity in play style. Being able to play the game how you want is a large reason its popular, but Wizards has been funneling towards a creature centric playstyle for a while now. Though I do consider Kaladesh to be an improvement in that regard, plenty of ways to do things to be found there.
I just don't really buy the idea that creature decks are "one playstyle." There's no sensible archetype breakdown that goes "creatureless control, creatureless lock, creatureless combo, burn... and then all creature decks." And creatureless or creature-light decks continue to win in multiple formats on occasion. I feel like this point usually means "let's go back to uncompromised permission and lock decks," which, ugh, no.
I dont get conspiracy. Its a very cool limited format, but stores run it for a weekend and thats it. I dont even see GPs having it as a quickfire event.
A lot of people play Magic with their friends, actually?
I'm not much of a draft player, so draft cards don't do a thing for me. And conspiracies are different for each player, which adds more rules for every player at the table, instead of applying the same rules for every player. And voting is another lengthy phase they added in the game itself.
Not to argue with your other points (which are reasonable despite my disagreement), but there isn't really a big rules burden in conspiracy. Of the 25 cards printed with the Conspiracy type, only two have an effect on anyone else but you -- one makes you the starting player, and one gives everyone else a token at the beginning of the game. The effects of the others can really be treated exactly as if they were enchantments that only affect the casting player, the only dfference is how they get into play.
For the former, I hadn't thought of that. Masterpiece cards have drawn value away from cards in Standard, so Standard decks can't be sold for as much.
I don't think this really considers the whole flipside here, though. If you previously made standard decks that were $200 and resold them for like $160, and now you make decks that are worth $100 and resell for $80, you're $20 better off after each rotation in total. Similarly, if you buy enough sealed product on average, the Masterpiece you'll wind up getting will even out your losses on the Standard cards. The only people who really lose out in value here are people who buy sealed product, but not enough to really average out to a Masterpiece. (Well and MTGO players, lulz.) I think the real core of the problem isn't any more complex than non-rotating staples being too expensive due to underprinting and the Reserved List.