TFL, I saw your argument a long time ago. While it is true aegi has overwhelming amount of "pseudostats", at the end of the day that's what it is: Fake stats. Remember that even by your own argument, 150 won't be used any turn due to only using special or physical. Secondly, this applies only if Aegi is slower. While this is common, that doesn't mean we can discount pokemon like Mega Mawile from the equation, who is far slower.

 The HP stat holds it back. While coupled with some insane defense, it still is OHKOd by Bisharp's knock off 70% of the time (and guaranteed with any prior damage).

 150 attack/special is devestating, but both can't be invested (or never are) as his HP stat would be worthless then. More importantly, Aegi possesses no good boosting set. SD+3 attacks? I have yet to face one or see one perform in such a way to justify it. There's no special boosting (which is an honest godsend for the meta). With the bulk, there is also no recover move. Limited to his natural bulk and generally limited to his natural attack, he's just an incredibly bulky pivot, slightly resembling a more specially bulky Landorus-T.

 Yes, the sets are generally an issue. However, this is comparable to 5th gen Kyub. A set to beat everything but not everything beaten by a set. Only Amoongus really can hold claim to true Aegi countering. However, Chesnaught, Mandibuzz, Hippowdon, Gliscor, Gyarados-m (esp when mega evolving) all can hold claim to countering MANY sets. As in, most of them very rarely lose to it. Kyub did stall worse last gen, having exactly one stall mon that could beat it with any consistency (jirachi). Aegi's bulk allows him to generally take one SE move (from something not named Bisharp or roughly comparable to...) but he has no way to prepare for the second or guarantee the kill. For attackers like Landorus, Garchomp or any of the common EQ users, he's pretty easy to check down. Yes, you're going to have an issue switching in if he spams shadow ball, but then again try switching into a Landorus... or any powerful attacker. To be honest, hearing the arguments for the past month of "Oh, Chesnaught? Flash Cannon Aegi! Mandi? Head Smash Aegi! All Beaten" is garbage because A. Sets are uncommon and B. Aegi doesn't have a bag of holding for move slots.

 King's Shield is interesting. As aegi's single most important move to most sets, it is hard to take a loss -2 and the momentum swing is fairly ridiculous. However, what's coming in on Aegi that is so worried about KS? Most Aegi checks SPECIFICALLY run non contact moves. Aka EQ. Aka Special moves like fire blast. Aka Sucker Punch. The Metagame has adapted enough that this is a general non-factor.

 Aegi is obviously strong. Strong enough to force other mons to be unviable. HOWEVER, this is no different from any other really fantastic mon. Hmm, I can't FATHOM why infernape, Volcarona and Lucario are ALL UU now after one update... Couldn't possibly be Talonflame's doing... Probably Aegislash, right? You know what Starmie is? Outclassed. Outclassed as a spinner by Excadrill. Outclassed as a fast water type by Greninja. Explain to me why, even with Aegi gone, I'd use Starmie? Same for Medicham-mega when I can use Mega Mawile for power or a terrakion for better speed and fight coverage. Alakazam-mega is probably the only one I can see truly being inhibited by Aegislash on his own and I can also see talonflame restricting Alakazam badly.

 This is almost humorous anymore. Sadly, we've got so many people who won't give it the time of day and the mentality of ban all suspected is already set in stone. However, I really don't see "Aegi inhibiting the metagame".