As for the duels, I think it is just fair thing, because one with lots of ulti for big ultimate (like goliath or vamplord) have a definite advantage over same player with same sets and same ultis but without ulti meter.
As for BGs, it will make game openers less bursty, which is good thing in my opinion. It will require removing any ulti gain on respawn (as necros at least can prebuff a lot during game start).
Any reason why duels and BGs doesn't start with clearing up ultimate meter? 23 votes
Clear ultis in both modes
Clear ultis in duels only
1 vote
Leave everything as it is