Horwath
Legend
Maybe, maybe not, but what it is noticeable that you make work for DM harder when there is large discrepancy in CON score in the party, especially with monsters with AoE attacks.I find having a 10 or 14 Con in 5e doesn't really matter much when it comes to hit points, at low levels anything that would kill you if you had 10 Con will probably also kill you at 14 and at high levels you typically have more than enough hp and/or allies that will help you back on your feet. I mostly increase Con for other effects, such as a barbarian's unarmoured defence or if I want my wizard to have a somewhat decent chance to keep concentrating (though not even that's a given).
it gets worse when low HD class has low Con and high HD class has high Con
at 5th level you can have wizard with 8 Con and barbarian with 18 Con, that is 17 vs 60 HP spread.
It's a nightmare for DMs.
so better to have "gentleman's agreement" that most will have 14 Con and outliers if they really must have different score, can get away with 12 or 16.