Since clans can pass from the level 1 to the level 5 in literally 1 day, this would not work unless we increase this to level 1 to the level 20 for example. The idea is not bad but we need to think about some important points before implementing something like that

1. Will the new clans actually use it?

We can have the room and all but we need something that will attract these clans to the room to actually play games or it will be another public room that will be empty everyday. We would need something that would really help these clans by playing there, and for now I really can think about anything.

2. Is XP really important for a new clan?

Since we stopped to put out fingers in every clan that doesn't follow our basic model (clan story, goals etc), the clans are not worried anymore with the forum and, clans can use perk points only in the forum for now and most of them are for official clans only. The only thing I can think now to help a bit with this point is to implement new perks for unofficial clans and also implement in-game perks. We actually have a big discussion about new perks and you can expect new perks to come soon.

3. How will XP boost clans?

XP alone will not help new clans in any way, unless we implement a whole new system to work. I can't tell much as erth said but we also have plans for some new cool things, but this one will take relatively a long time to be implement, but for now we don't have anything that would really make clans need XP to boost something.

Your idea is good, but needs a lot of minor points to actually work