Interesting proposal! I understand the principle behind increasing the quorum threshold: to ensure that a sufficient majority of the community is actively involved.
One argument against increasing the quorum threshold is a lower threshold makes it more important for large token-holders to be actively involved in the governance process. Since the current quorum is 40m votes and majority vote (e.g., a 45m yes vote, 70m no vote wouldn’t pass), keeping the current quorum may actually result in a more active, involved governance process. Increasing the threshold a large degree makes it easier for token-holders to abstain, which could be argued is undesirable.
Overall, don’t feel super strongly one way or the other here, but would be cognizant of the risks of raising the quorum too high.
I’m in support of this as a temp check (it’s already passed), but worth discussing this aspect more in the consensus check.