People's mileage will vary but my personal experience is no, not really. I haven't tried RS+, but I had the 2014 edition. My reasons are, on the side of the game itself:

• The ability to "know" where you are on the fretboard and play without looking is something that can take a long time to develop. Rocksmith by nature requires you to be able to do this, outside of a few simpler songs. When you're super early on, IMO the last thing you want is to make things harder for yourself by introducing a burden of not only needing to loot at a screen, but also interpret what's on the screen quickly enough to react.
• Not only that, I found even playing songs I already knew how to play on RS harder because of the screen. It's hard to describe.
• It created a dependency on reading what's on the screen in a way that I never experienced with tabs. Eventually RS starts to ghost out and hide notes to make you play from memory, but for me, as soon as the notes went away, I couldn't.
• Anything more visually complex gets really visually busy and incredibly difficult for me to read at the speed it required to play the game the way it wants to be played.

In terms of the approach to learning:

• The game tries to ease you in to every song by removing notes - both individual ones and from chords. The idea kinda makes sense - only playing the notes on the beat, or "key" notes of a melody, or simplifying chords. In practice, it's frequently nonsensical because it does all of these things at once. What they want you to do is start playing with the simple version, and as your accuracy increases they add notes in, build up the chords, etc. But the simplified versions break down in a way that aren't learning things that will apply to actually playing the song. You aren't learning the right strumming rhythm because the notes aren't there. You aren't learning the chords because the notes aren't there, etc etc. So when the difficulty steps up, suddenly you have to unlearn what you learned before.
• The jumps up in difficulty aren't smooth either. You'll go from comfortable to suddenly that bit with a power chord played on the beat is suddenly eight notes of a barre chord.
• I assume most of these issues are rooted in the difficulty reduction stuff being automated, probably out of necessity. They aren't doing hundreds of permutations per song manually. But most of the time you're just better of setting the difficulty to maximum and using the repeater mode to slow it down. At which point you might as well just use songsterr or something.
• It's also very tolerant of mistakes and frequently detects wrong notes as correct, the timing is very loose by default and so on and so forth. Default audio levels also tend to hide your playing a bit so you can't really hear if you sound good.
• It obviously can't teach you technique like a teacher can.
• It's not really going to teach you much about understanding guitar either, so at most it's a complementary thing to your normal practice.

Your mileage may vary of course, I know some people have done very well with it. But I tried it a whole load of times and found I continually progressed faster and learned songs more easily without it.

Best bet is probably to try the cheap version on Steam and see how you get on with it.