By the way, there is no excuse for the cost to be quadratic. That is one of the many crocks in the BitcoinCore implementation, that will take more crocks to work around. Like the Segregated Witnesses proposal, malleability and its partial patches, blockchain voting to increase the limit, etc..
Jorge, do you have a link to how this issue arises and, ideally, how it might be solved?
I have to agree that it seems like the core devs are working on the wrong things currently. I know open source is supposed to be about scratching an itch but there are some quite serious issues that have consistently failed to be addressed with core (some of which are seeing progress in some of the alternate versions).