There is a lot wrong with tournaments for them to be counted as good, fair enough you get free stuff but if they ran another event in the place of tournaments you would also get free stuff and enjoy it more.
The difference between shards is really bad, I have out scored my friends every tournament and struggled to make the top 1000 they have gotten into the top 100.
Once you are over level 80 and have an arena power of 35k you are matched with players who have over 50k.
The characters are only rewarded to the top few and the tournaments are advertised as your chance to get the character yet most won't and they keep changing the character so you can't even work on one over multiple tournaments.
And all that is not including the cheaters who are increasing more each tournament as players realise its the only way for them to get the overpowered characters rewarded in tournaments.