The UT selection process hasn't changed in recent years, unless something very new is coming down the pipe (which is always possible), I can't see the basics of it morphing too drastically.
As with any highly competitive OT competition in the CF, there are far more applicants than there are positions.
What makes the UTP different is the leadership factor. For other OTs, it's mostly based on technical aptitude (SAR Techs and Int Ops are a bit different IMHO, you also need to be partially insane for those trades).
How that leadership is measured is going to be important because that is what is going to make you stand out on the merit board. You are going to want to have more than one example of leadership.
Think of it this way: everyone at the merit board will have 2 full university credits (marks don't really matter unless things are very close points wise), everyone will have a letter from their CO, everyone will have the recommendation from the PSO, CFAT test scores etc etc.
So if everyone have the same basic requirements, how are you going to stand out? Everything from little league coach, soup kitchen volunteer, blood donor for life, leadership courses (PLQ/JLC), leadership positions, OPI voluntolds, ran ball hockey for the regiment, organized the jr jungle run for the kids at family day etc etc.
Don't get leadership confused with rank. I got accepted as a Cpl (many are, I'm not special). But I was also Sect 2IC, Sect IC, various OPI spots over the last few years, multiple charity/community events. I also ran a few half marathons and had 1st year uni done part time.
UT selection, like all merit boards, are all inclusive deals. Just remember, this is not a PER, stuff you did 2-3 (or more) years ago still count!