Wasted? Without them "Hamilton" there is no list.

Well I think we’ll need to reserve judgement on these until further down the line. I guess they could have introduced the Eternals and the now presumed dead Celestial without planning a payoff but I somehow doubt it. Certainly the Black Knight will become a bigger part of the MCU at some point. The throwaway Illuminati scene I really didn’t like, it just seemed pointless, and Quicksilver again seemed odd, both of these almost seemed like they intentionally wanted to puss on the fans bonfire.

“Spider-Man: No Way Home is a near-flawless film“ LMAO. I quit reading after that comment.

Ugh... seriously?

Lizard - They included him, that was enough. Any more time spent on the individual villains would have been waste of what is the MCU's best project so far. And... "we may never forgive them for not including the lab coat and purple pants". That's the final takeaway? Get a life.
Dane - what are you talking about? This introduced the character to prep him for becoming who he is. That's not a waste.
Jake Lockley - Again - this introduced the character, it didn't waste him.
Skaar - same as the last two.
Quicksilver - This is maybe the only one on the list you might be right about. They could have done something more with him, BUT, it served it's purpose in WandaVision, and killing him in Age of Ultron was a shocking twist and has made for developing Wanda into what she is (was...?)
Illuminati - not a waste. Some fun introductions, acknowledgment of the existence of mutants, and even more importantly, Strange acknowledges that the fantastic four already exist in the MCU, which means they'll take it in the right direction and tease them in Quantumania as being trapped in the negative zone (or quantum realm) all this time.
Tiamut - they killed a Celestial. Not a waste. So they don't mention Tiamut elsewhere. The part I like best about the current phase is we're introducing new characters with their own problems to deal with in their own self-contained stories and being self-contained is absolutely the best part about Wakanda Forever. That story isn't worried about addressing everything else. That's what we needed from Phase 4 and everyone is far too concerned with what happens next that we can never enjoy what's happening in the moment. They got their own sh*t to deal with, and yeah, it's weird that there's a Celestial sticking out of the ocean, but this world has seen things just as strange, so why talk about it ALL the time.

Unless you're pissed that by not connecting every little thing you won't be able to complain about continuity issues later, which does provide for more lame articles that I can't seem to stop reading. By not connecting every property to everything else, it leaves more wiggle room to change the trajectory without worrying about what's already canon.

I wonder if the price of marble dropped in the MCU? There should be an article on that too.