Not at all. The chord symbols and slash notation in Dorico work great. The number of options it gives you for chord symbols is amazing, and you can also create your own. It's really well thought out. This video gives a rundown of many of the options for chord symbols:
They can be set up as defaults once you have things the way you like.
I found the program a little confusing at first (in particular, the way notes are input), but it's really enjoyable to use, and the output looks fantastic (I've never seen anyone else's charts that look as nice as mine (I think it's all been stuff from Finale or MuseScore). I tried Sibelius First (meh), some low end version of Finale (BLECH), and Notion (generally really nice, especially for the price, but it would do weird things that I couldn't figure out fairly regularly). I was able to take advantage of the competitive upgrade with Dorico, and wow, what a difference! I find it pretty logically laid out, and after a a few hours of use, reasonably easy to use. Occasionally I come across something I can't figure out, but a post to the official forum or the facebook group usually gets me an answer very quickly. Probably its biggest downside is that it offers SO MANY options for how you want particular things treated visually that it can take a while to remember where things are and a while to scroll through all the options to find what you want.
It may be overkill for lead sheets, but that's basically what I use it for. The newish Dorico Elements offers probably all the features anyone would need for lead sheets at a much lower price.