New Map/ Game Style Idea

I was playing League the other day and something got into my mind, Riot games have not yet introduce a game map based on the style of team defense. 5 players will be on the attacking side and 5 players will be defending.

The attacking side will have a time limit to reach a certain checkpoint and if they do they gain perks and more time to advance. Minions will get stronger from the defending side as time goes on so the attackers must advance quickly.

As because the attacking side will not have any minion perks (but they will still have minions) so in the contrary they will have a higher level cap on their champions, and the defending side will have a lower level cap (e.g. attacking side level 20 cap, defending side level 15).

The map should consist of one main S-shaped lane with several alley trails for ganks and hidden shops/ objectives. The map should be created in a style of a castle, with attackers breaking the main gate from the start and start advancing to the throne room.

I hope people would like this idea and feel free to chime in some of your thoughts.

Cheers, Phaliur