If you don't have any problems while playing the game such as connection, etc. Then it fine, but if you ask about how many people playing this game? It up to your region.
I want to say that if your were in US or EU, You don't need to worry about people and also have a lot of mode to play.
Unlike SEA server 90% people play only attrition the others 10% are Frontier Defend or Campaigns.
I'm myself in SEA region most of the time i play with the same people (Almost every time especially Full Team GEN 10, I never have a chance to play that side all of them are friend with each other) This make the game so boring.
I never have a chance to win if i'm not farming a lot of minion to keep the score up.
BTW, Last thing if you have any problem for the game you won't get any help from the support because they are not really care to customer.
PS. Like my self never got any answer or help from getting a problem for the game(almost 2 week now i think)