I strongly disagree. The maps add tons of variety and the objectives force you to have team battles instead of just one vs one landing to last hit minions all game. Shared XP is another part of making it less about winning your one lane
The issue is they were late to MOBAs and made the game entirely free so there was no reason to really support the game. Eventually the finance people notice
The maps remove variety because they shrink the possible space of what you can do to a finite number of gameplay objectives. The game tells you that some objective starts in exactly 1:27 from now and if you're not there at that time your team is disadvantaged and probably about to lose. That's not variety, that gets old quick, as a player as well as an audience for a professional league that you'd need to even start competing with any other Moba.
The issue is they were late to MOBAs and made the game entirely free so there was no reason to really support the game. Eventually the finance people notice