If the majority do not adopt it, then it would be a useless movement and there would be no takeover of anything. Hold your horses, people! It's not such a doom.
There's no telling what might happen right now and this does cause some concern for investors. If the proposal only had a required consensus threshold that is higher than 75% there would be less risk with whichever path this goes down.
75% is generous, normally you need 67% to change constitution laws in most countries. It is always tradeoff how big minority you want give the right to veto majority will. If you think 5% or 10% can veto 90% majoriy, your probably part of this minority and want more power than you actually have.
What about if we need 90% support for not increasing to 2MB, otherwise we increase to 2MB. You see, just 10% could veto such change even if almost 90% would disagree. It is not right to give such small minority much veto power in eighter case in my opinion, 67% mostly used has reasons behind, and 75% is very generous imo if 26% still can be allowed to veto 74% will