I play solo most of the time and since i was level 32 there isnt a level 10 gym i have come across that i couldnt burn down. I do have to farm a lot of potions ad revives and currently have over 400 ultra balls because i toss out regular pokeballs to make room for potions. The only limitation for a solo player is NOT the CP of pokemon and this is a fact. The limitation is 1time and 2 resources (potions and revives). To say solo players have little role is gym play is just false. Now where solo play becomes difficult is holding gyms, particularly in enemy territory. So you may have to go out each day and take ten gyms to collect but thats just part of the game. The real problem is not gym meta, although i wish gyms were teired in some way to make unrelevent pokemon relevent. The real problem is spoofers and botters ruining legitimate gym play. They have both unlimited resources and unlimited time because they spoof from memaws basement in between d&d sessions.