This is why abandonment lockouts need to be implemented, as they were in group finder.
If not, this will simply fail again.
Lock outs don't stop people from leaving a game they think they will lose. Look at warzones. People still leave if they think their team isn't optimal or their team starts losing.
We do not have the population for ranked Warzones to cater only to winning teams.
Bioware already tried rewarding winning teams only, it failed. What makes them think it will work in ranked PvP which has a smaller player base and much smaller teams where every player counts.