I think reaction score is thumbs up, but not 100% sure. The pts you can actually view what you have earned and its pts rewarded for things like # of posts. Somewhere I was able to see how I earned the pts, cant remember where it is though. Just found it. I clicked on my profile so that it took up the whole we page. Then you click on the pt # you have, on the right side of screen, and it will show the pts you have earned at what the pts are for.
Now that I'm used to it, I prefer the new site layout. Some observations:
When I try to put in a smiley or emoji on mobile I get an error. This is with a Samsung Galaxy phone and Chrome browser.
When using multi-quote across multiple pages in a thread it erases the previous quote. For example, if I wanted to quote a post on pages 1 and 2 of a thread for my reply, the page 1 quote would disappear when I moved to the second page to get the second one. I'd have to copy and paste the first one into the text box.
I also like that you've put in the ability to tag members in a post. I first saw that feature over at tmuscle and it's a great idea.