I understand the situation. But this is not right. ultra.nitro is having the majority of the hash power. And it seems that there is no planned actions to dissipate those hashes to other pools. With so many downtimes on leetpool, this situation will continue to reappear in the future. I'm mining at idcray, but thing are not so good there either.
utc.greekpool.eu just re-opened and mining. They were a good competitor and they had to relocate servers. I am sure they will build up pretty quick and share the hashes. Nitro is not trying to corner the market. I assure you that.