There are accounts above mine with hundreds of BTC outstanding.  If all legacy power is directed at those accounts, it just means that those owners will benefit before difficulty increases and others will get nothing, instead of everyone sharing something.

When I joined I understood that difficulty would increase but I accepted that new members would make up for that.  Now, I do not benefit from new members and I think it will be difficult to attract new investors due to ROI time, so if all power is directed at 10 oldest accounts, I will never see anything!

This is a complete change to the original concept and I am not content with only the 10 oldest accounts receiving any hashrate (apart from new deposits).  This part needs a rethink, otherwise 10 individuals (or maybe less if they are owned by the same people) will benefit and no one else will.