Core could propose a 2mb hard limit be implemented first, as 2mb is also on their to do list? (nothing else. no other general tweeks)
Absent the Schnorr sigs enabled by segwit, 2mb blocks would require "other general tweeks" in the form of restricting old style quadratic scaling sigs to some magic number maximum.
Even Gavin concluded that was a Bad Idea, because otherwise we get obnoxiously construed troll blocks that take a minute or longer to process. And that means more empty blocks, because miners aren't going to stop mining while the troll blocks complete validation sigops.
Please stop suggesting and advocating nonsense and misinformation about "
The One Simple Trick To Scale Bitcoin That Core Doesn't Want You To Know."