Personally I think Ranked should have been left the way it was, excluding the top 5000 players. The solution to the issue for everyone is by implementing a performance base point system. Calculated by your in game performance with Kills/Death.
for the modes with an objective like Domination & Hardpoint, also calculating your defence and offence performance. For example capturing the zone, killing while defending in the zone so on and so forth.
This would create a base line for SBMM, balanced for everyone. Let’s say you’re a Master Tier player, but your performance points are -1250-. This would place you in matches with similar players, ranging from 1100-1400 performance points. While you still have Master Tier players that have a 300 performance point but place into the 100-500 performance matches.
FYI Grandmaster isn’t a solution if the by-pass is by simply playing more.
Would you like to see Performance Points?