Yep, which is why before IME DEX and CON were always in the top 3 scores for just about every PC.Yeah, dex and con are must-haves for nearly everyone (dex can be dumped if you have heavy armor), and str and wis are generally useful for anyone. Int and Cha are either your spellcasting ability or a nice-to-have.
By removing HP from CON and making the AC change to DEX below, we've removed that and had more interesting arrays.
A house-rule we use now is you can add your DEX mod to AC or your proficiency bonus - 2. This way DEX isn't needed for AC, at least not at higher levels. Another option is to use half your proficiency bonus to AC in place of DEX and we go back and forth about which way we like better.I'd be willing to try getting Con out of hp, (although it becomes a bit of a nice-to-have at that point IMO) but I'm more worried about getting dex out of AC for most classes. Without needing it for AC dex it's still useful for anyone but it shouldn't be necessary for classes like wizards and druids and such.
We already allow Monks and Barbarians to use full proficiency bonus to replace DEX and/or WIS/CON for Unarmored Defense.
Another change is Sorcerers use CON for their spellcasting ability in our games, not CHA. Too many CHA-based casters already. Unfortunately, it was a net-0 shift because we moved Clerics to CHA...