The COC has a good war event in the sense that the majority war winners are good at team work (alliance will win if everyone really spends in-game resource and time to participate). Although the process is not so fantastic. And any alliance has the freedom to war or not. Since war event itself really costs more resource and time. But it rewards something which is optional but cannot be bought directly.
Although your unlimited chance war against specified alliance is appealing. I still don't get how you will organize the war. Alliance Wars & Command Structure Your post mentioned you can fight deliberately against any alliance. Then how I choose opponent alliance? Top 100 alliance is hard to deal with, other alliances below top 200 is like a farm to do field trip? Or famous alliance means war by war till the end the month without rest? Let's face it. The game need to make war appealing to real fans, but it must make it optional. Please specify the matchmaking process.