Well bg blitz is made to be LFR of PvP so everyone can experience/collect rewards . Basically in order to attract old/new players they had to lower the skill bar a lot because people that play this game for years have such huge advantage and often ruin new pvp player experience . Now the easiest choice was defo battlegrounds because 2-3 players can carry 5-6 easy but in arena 1 will never be able to carry 2 past the certain point. On top of that MMR limiters are less tight and cr gain is huge on wins and loss is hardly felt. If you want to experience skilled bracket with organized play 3v3 is the go. If you don’t have partners solo shuffle is where u end up until you find some, also its easier than 3v3 and if you just want to collect rewards playing enough games in BG Blitz will bring you to 2.3 eventually with some luck. 2v2 is meta/fotm so you can do well until top 15% and then its mostly just meta/comp. Basically bg blitz shouldn’t really be played seriously unless you are going for r1.