I think that grinding HWM was better than solo q. Queue is full of premades with healer, getting a good team composition with solo q is like rolling perfect GS600 item (not happening) and at the end you are rewarded nothing (100EXP is nothing do not even try to change my mind when you have people running great cleave for 12k exp per hour doing PvE missions).
Split the queues - separate for groups and separate for solos. Make signup require filling up a role or something. Do anything because this is unplayable at the moment.