Hi Tim,
Been through several major versions of the software and no change that I am aware of despite my repeated requests in surveys :/
I will say that after a year or two I became more comfortable with Premiere than I ever was with Vegas. I still miss the dissolve options, but I’ve found that I don’t use them as much as I thought I did and I’ve gotten very comfortable with keyframing them if needed (Ctrl-click on the horizontal line on the clip to create a keyframe).
For me, the additional pro functionality that Premiere has that was missing in Vegas (at the time I left anyway) more than makes up for the minor things like this that I miss.
For what it’s worth, I took an introductory course on Premiere Pro using a Lynda.com (now LinkedIn Learning) subscription and made sure to actually complete the exercises and it got me used to the software in no time. I highly recommend this or a similar course in the beginning.
Hope that helps!