They always did, except maybe in 3.x. Just not this much.
It's not the only choice, but always was one of the best, yes.
What are
average values?
That's the sort of thing you could look up or just ask DM before the game.
Yeah, 5e Hold and other such spells became almost useless. Was this even play-tested?
They probably tried to avoid 3.x style juggernaut, but don't really have a hang of it. It could be made less useless while still uncertain, but there's another reason why it's a bad idea: this adds yet another level multiplier (via proficiency bonus) to the effect of those spells, i.e. low-level wizards are nerfed more than high-level - which is the opposite of curbing the "linear warriors / square wizards" problem.
AD&D2 Web is 8 10x10x10' cubes, and a creature with Str 13+ (if they aren't NPC, see DM's fiat) can push through,
but this takes time and you could set the whole thing on fire before it emerges (if
that doesn't help, you're screwed no matter what).
Having good peak damage, but sucking at average damage output would make sense and be consistent with the classics.
And to think, before 3.x 1-level spell
Friends works pretty much like this, only on
everything in 60' radius (though with tiny duration).