sorry about posting straight after myself but i read all the other posts, and ive had some ideas.
i really think that sending out the mothership to fight out against all of the other motherships is a fantastic idea, because even though u have a mothership u dont really do too much with it, it defends and attacks, and u can look for planets which isnt amazing but this way ur using attack and defnses and fleets all at the same time!!!
also i think that the more people in the alliance the less each person gets is a good idea.
right, i dont think this is going to make any sense lol.
however u can get more planets with more people for example, every 15 people u have in ur alliance u get a planet and you can only have 2bil power for every member so every member gets 2bil attack/defence unless u make it a bigger planet like individuals planets small, normal ... so start off at small = 500mil each, normal = 1bil each, 2bil 3bil 4bil 8bil 20bil and for the last one u take about 4 trillion. btw this is working with the idea that each alliance has an alliance bank and anyone can add any amounts to it but can only make 3 transactions a week for example. this would again benefit the larger alliances but i think i may have around that. each planet costs so much to upgrade and rather than using algebra for this

i will use examples, so the last upgrade, call it 4tril which is 4,000,000,000,000. if ur in top 4 alliances u pay 4tril. if ur in top 20 u pay 2trillion if u in top 100 u pay 1tril, i dunno if this does fix the problem but its an attempt at a solution. i spose it is kinda harsh to penalise the higher ranked alliances but its very hard to even consider catching them.
urm i will probs think of some more thigns to say, but its a awesome idea!!! i just needs lots of thinking and must be executed in just the right way.
thanks for reading -simon123-