The problem is you can't do that shit against the level of wrestling that Khabib and Islam bring to the table.
BJJ guys all say the same thing until get they get in there with one of these dagi wrestlers, and then they shut their whore mouths afterwards. Even Maia said, NO ONE can submit guys like Khabib in an MMA fight. He's just too good with his top pressure.
That's why we need mandatory standups in MMA. The dagi wrestlers have evolved to the point that they can hold you down for the whole round, and there's nothing you can do. You can't submit them. And if you try to stand up, they will take your back.
If they were forced to open with strikes and go for submissions, or be stood up in 30-60 seconds, then the fights would get much more exciting. When they open up for big punches, that either creates massive damage, or opens opportunities for a scramble to reset to the feet. If they go for an armbar, either they finish the fight, or they create a scramble that leads to opportunities to get back to the feet. They could make an aggressive move to go for mount instead of sitting in half guard or side control, but that would create an opportunity for scrambles to stand up.
Are you seeing a pattern? Caucuses wrestlers like Islam and Khamzat don't want to take risks with half guard and side control, because they know they will win rounds easily. Taking a risk to make the fight more exciting also risks scrambles and their opponent standing up. And unless we have mandatory standups after 30-60 seconds, this won't change.