My problem is not the lv cap. Is the low lv cap in a "epic" campaign. You don't fight dragons nor enter on the underdark and do epic things on BG1. It is restricted to BG2.
Or you have a Dungeons & Kobolds game
Or you have a game where the PC's enter the underdark and escape a mindflayer ship.
You can't have both.
And I was talking about Eldritch Blast and adult goblins on P&P has 6 hp. On game, goblin children has 15 hp. 5e is already the slowest edition, not counting 4e which isn't D&D. Why make things even more bloated?
I fundamentally disagree with you.
Where you are or what you fight is irrelevant as long as difficulty has it's place. For example you do not fight the Dragon in Early Access, you meet one yes. The world exists around you and that means dangerous or epic things can happen around you at any time, and not only when you are of appropriate experience. The only difference is your choice. If I am above a certain level I might decide to fight my way through the Underdark rather than sneak.
To have humble beginnings AGAIN is just bloody lazy writing and is done to death.
Using BG1 as an example, there are plenty of very dangerous moments early doors, Saverok killing Gorion for example. "Plot point" you say, so is the Nautoloid. There are perhaps no Dragons to fight in BG1, (neither are there any here!) but there were Wyverns. The whole start to BG3 is about survival, against the Tadpole, the crash and anything that mioght be after you until you can get some answers and hopefully a cure.
So on Spells I'll concede there is work needed, but the Epic vs lvl aspect is only an argument if everything was downscaled to the level of the character and whilst there has been a modicum of evidence for that with the Grove, it's not wholesale.