Apparently WOTC is on round 2 of their Hybrid playest rules. Now, you get to select certain class features when combining classes and Hit points are now fractions so as to not loose out on any.
To me, this seems like the better way to go with multiclassing and was something I was pondering modifying on Version 1 of the rules before this hit albeit not like they did. But…meh. Saves me a whole lot of work.