So I am going to both-sides this. I definitely think that martials, especially at higher levels, could use a buff and that casters have some utility spells that are just too powerful and that should be nerfed or simply removed.
However, I'm perfectly fine with most of out-of-combat contribution being via skills and
roleplay, even though "anyone can do it." Like so what if anyone can do it? Everyone is still contributing and the bizarre notion of "being shut down from social or exploration pillar" simply isn't something that happens.
Here is an issue with the skills though. Characters like the dwarfish brewer by
@Oofta are fine in the early game, but because the point buy is to stingy, and because how levelling ASIs work it makes it super difficult to maintain your "hobby attributes" at decent levels. That Cha 14 and a proficiency might be fine at early on, but it feels pretty feeble later on when Cha classes have 20 and maybe an expertise. So if the skills are to be the main way you do out-of-combat stuff, there really should be an easier way to keep the related attributes at decent levels even if it wasn't your class' main attribute. Personally I've been more generous with ability points, feats and ASIs, but so that levelling ASIs are always two +1s rather than +2, so you are forced to spread the points around a bit.
In the last session of my campaign, the characters were solving an orcish murder mystery. There was no combat, it was all investigating the environs and
a ton of talking to NPCs.
Characters were a human barbarian, a human warlock, an orc rogue and an orc bard. They're at the eighth level.
Spells cast by the warlock: clairvoyance, invisibility, detect magic.
Class features used by the bard: bardic inspiration
Spells cast by the barbarian: speak with animals (this was super useful and gave them an eyewitness testimony that put them instantly on the right tracks.)
Skills used were survival, arcana, a lot of perception, investigation, persuasion and insight. And not always by the character with the best bonus.
I feel all the characters contributed significantly. The rogue has expertise in persuasion and insight, so that obviously was rather helpful, even though they didn't have any spells or other similar tricks they could utilise. And most importantly, everyone made decisions, contributed ideas and participated in in-character discussions. Even if you don't have the best numbers, you can still talk and as questions. So martials being sidelined and just silently waiting for combat to start really isn't something I've seen.