Maybe WR coach, but Arians gets all the QBs he coaches killed so i wouldn't say he is a good qb coach
He sucks as an oc.... oh you will get the open read on a deep ball and he is the pinnacle at designing routes that Pull safeties off those deep routes... but yeah you need four to five seconds for his routes to work... he despises slants and other short passes that aren’t bubble screens... but his knowledge of the offense is amazing.... he is best fitted with a qb that can call his own plays..... ummm well and can read a d without an earpiece in his ear telling him the best option