I'd take a look at some of my writings for meta transactions and templates here: https://github.com/Storj/Metadisk/wiki

Bitcoin only supports up to 80 byte of data per transaction, our model uses 1 kb or more, which makes unusable for our current platform. We are not creating another cryptocurrency just for the sake of doing so. There are many technical reasons why we can't do this yet.

So we already have a long term plan to implement sidechains or treechains. Currently this is only concept/vaporware, so we are not waiting around until it happens.