Since i cant find games on my main account anymore im smurfing alot and i can tell, that i have significant higher search times until i find a game the longer i played on a single smurf. So i doubt, that this system is currently not used. I am quitting games on purpose to stay on plat to find matches quickly when someone else already quit the game ... When i reach about 1000 kills in a playlist on a a smurf, it takes me about 10 minutes to find a game, even im still plat (i have kds of 3 - 4). As soon as i invite a new account (smurf) in my lobby or create a new smurf, search times drop to a few seconds.
Dont get me wrong, smurfing is a huge problem, specially since creating new accounts is for free and take a few seconds. Reasons for me for searching on a smurf are:
i cant find games on my main account in doubles, me or my teammate need to use a smurf. (happens since the weapon tuning update)
the only playlist to find a game on a champ rank is probably hcs.
i dont want to play on a champ rank by myself, since im matching teams.
i dont want to play ffa, because i receive a loss in stats when i place 2nd or worse (it should be like in h3, upper half of the lobby gets a win in stats)
There are also other reasons to play on a smurf:
Helping your friend to rank up better.
You can play on a smurf to help each other to rank up better. We are doing this to get games quick not to boost! In result we are matching low players and getting easy wins and finding games. The problem is, that a champ and a smurf (bronz - gold) in a lobby matching plats and diamonds. Just go back to the h3 system, where it didnt help too much to play on a smurf. (A 50 and a 1 in the same lobby will still match players from 50 - 40, but they will get the higher ranked players in their lobby, thats still a huge advantage for the smurf lobby. A 49 and a 1 will search from 49 - 39 instead from 50 - 39, thats also a advantage for the smurflobby because you can avoid 50s or higher players than your actual rank)
In my opinion the best way to reduce smurfing is:
give high skilled players a reason to play on their main account by themselves by introduce party matching again!
dont reward players by playing on smurfs and boosting each others up, the higest rank in a lobby makes the search radius, everyone in the seachradius gets put into a looby, the teamparing is random, so a high level players with a smurf dont get the high level teammates they matched in the search process. A win is a win, a loss is a loss! dont give or take more CSR because of the skill in the party. That can be abused by smurfing very well too.
Make the search radius for champs to diamond if no games are available, nothing is more frustrating than seaching 30 minutes for a game. U are basically stopping high players searching.
Give a win in stats in ffa to the upper half of the lobby, not just for 1st. If im by myself and i have a reason to play good games in ffa without ruining my stats i wouldnt play on a smurf ;)
Thats just my opinion, and i think there is way more to say about stats, the ranking system, the matching making system. And btw, socialplaylists should be social as well! I guess there is also still a hidden ranked system.
And sorry for my bad english, im german ;)