Oh gosh, yes! upgrade if you are still using PSE10 or 14!! So many better things that are worth it in newer versions. I waited for three years to upgrade until PSE2022 came out because they FINALLY gave us a version of the warp tool in this one after adding things I didn't really care about.
The drag and drop thing takes a bit of getting used to, but it isn't a big deal once you adjust. How is everyone else's program not doing the dropping on top of the layer you lift the mouse button on? mine still does that... :huh: but, whatever I am totally used to it now and would probably find it annoying if it changed back to the previous way.
Brushes, styles, actions are so much easier to load now (maybe you have that though? I can't remember what version they added the in program menu adding for those...)
You can adjust the spacing between letters of text (known as tracking - we used to have to have the oriental character options activated to play with it). Still wish they would give us a few more text tool options, but this one was needed badly.
Being able to group layers together in the layers palette takes some getting used to because the keyboard shortcut for clipping a layer to the one below changed, but I have come to really appreciate that feature.
All of the guided edits they have added are pretty awesome for doing fancier things for you. I tend to forget those are hiding in that other part of the program.
Now if only they would add spellcheck I think my longtime wishlist would be fulfilled- not that there aren't other additions that would be great, but the ones I have wanted for so long would be in it.