Thanks for reaching out!
The first one is planned. The second one will probably not happen anytime soon. Because of email rendering problems, basically with the new mobile trend, newsletters can't be working in the two columns format.
What we want here is to have emails which looks good everywhere, whichever the platform or email client. So that's something not really possible with multiple columns emails. Trust me only with single column templates our rendering specialist Jonathan has been losing a fair amount of hair ... And he seems keen on keeping a few for a couple of more years ;)
Nevertheless we plan on allowing custom HTML, not sure yet on the format of that, but we know some of you have this need.
Next time for your feature request go and browse this page : http://wysija.uservoice.com/forums/150107-feature-request
There is tons of ideas from wysija's friends, so probably you can find a few you like and want to vote for. And also that would be the right place to suggest new ideas :)