I'd imagine the California Democratic party will endorse a candidate and try to force the other Democrats out to try to get exactly 1 candidate in top 2. That's better than taking a risk of 0 or 2 with top 2. But either way, getting rid of top 2 would be much better.
Not necessarily, the more conservative dem one may win with crossover votes. Silicon Valley already tried that technique to get more moderate democrats elected in some house seats.
Hopefully they repeal it before they get an R on R statewide election, it hasn't even made the state any less polarized.
