The biggest problems I see with solo que fall into two tall categories:
There is a significant lack of team co-ordination, mostly brought out by terrible map communication. This means that a person running a spirit ranger or mm necro and sitting at home point all day is going to create an advantage for their team because it usually takes at least 2 players to take these classes down. Trying to organize that kind of a push at far at the right time in solo que is near impossible because people are paying attention to what they are fighting and not to map chat. Also, you go ahead and try and bark orders for your team through mapchat when you have a warrior trying to pin you down. This also means running a warrior (which is broken) is going to give you a significant advantage simply because it is the single class that requires the least amount of teamwork to get things done. There is a reason why we see so many of them in soloque.
The second problem is the gap between hotjoin and soloque. Most people in hotjoin run straight dps. We see dps guards, dps rangers, dps engies, dps warriors, dps thieves, etc. On a rare occasion we see a person using a more tanky build, but since hotjoin has the numbers (8v8) no one seems to really care because you can easily put at least 3 people on a point in general. There is a huge problem here and a huge learning curve for people who have played hotjoin for a while and immediately jump into soloque. Frequently, we see classes do a lone push on far only to die repeatedly the entire game because someone was running spirit ranger and just sitting on home with one hand on their kitten and the other pressing 1 all game. I’m almost certain people say to themselves, “My class is GREAT in 1v1’s (really only warrior), so I should handle this fight EASILY. If I lose, it’s ether because I got outplayed, or it’s because the person is running a spirit ranger no-skill build (which it is a no-skill build) so I will complain about it on the forums.” When in reality, it’s just that they have very little experience on how to far point push effectively because of their hotjoin experiences with all dps builds tell them they should be able to kill anything. Couple this with a sever lack of communication, and you get people dieing on far point all day. This isn’t just a far point push issue ether. We see home defenders just afking on home all day as well when they should be pushing up to mid to help support, and instead develop some map awareness (i.e. skill) to constantly watch home to make sure someone isn’t trying to steal a decap from it. So because they’re watching T.V. at home, mid gets wiped and they don’t care because they think to themselves, “Not my problem, I have home.”
tl;dr
The learning leap from hotjoin to other forms of structured pvp is too big. Communication is terrible and leads to simple cheese winning maps.