you're right that volatility in rules can be devastating. in this case, i'm a fan of the changes made in the fork. massive inflation and too long a lock-in period dissuaded me from investing more. Now my two biggest concerns are fixed and i'm fully bullish.
that said, the powers that be should be extremely circumspect in the future in making other major changes.
Yes absolutely and even when changes are necessary it is best to proceed slowly and with caution. Markets get spooked easily.