Nothing is wrong with a ladder where the best way to get #1 is to wait a couple of years. What you talking about :P
But yeah, the deflation is real.
Should the current policy be changed?
Sure, just precisely to what are you suggesting? Oh, and to make it fun it has to be implementable. (i.e. Ban alt's is not that easily implementable. For example a 'wait 5 months' rule needs someone to keep track. Besides rating's don't expire so it doesn't help anyway.)
In my noobish understanding. A new account comes into the ladder. Plays for a bit, wins a bit, gains some rating. Then quits playing the RT ladder. The rating points that new account just won has been removed from circulation, leading to deflation. Bet I am oversimplifying af and everything I wrote here is just wrong, but this means the "average" rating of active players is decreased.
Either way, when QM and Unty is out the RT ladder is "replace" in a sense I guess. Not sure if RT ladder would still be around or not, but the need for it is certently gone at that point.
Edited 9/17/2017 21:08:43