The 14-35mm f/4 L is the most interesting of yet-to-be-announced-and-released lenses from this roadmap for me.
I love UWA for landscape mainly, and so prefer each mm of (ultra) wide angle goodness over an extra stop of speed. 95% of the time at ~14mm/15mm I'm at f/8 - f/16 anyway. I also use UWA for some architecture, and occasionally creative photography (e.g. artistic subjects appearing disproportionately large in the foreground).
I understand that some people prefer the slightly smaller and lighter weight of a 24-70mm f/4 over a 24-105mm f/4, however there's not much in it, and the reviews of the RF 24-105mm f/4 are very positive.
(The 24-70 f/4 are around 600g on average, with the 24-105 f/4 @ ~700g).
Distortion is not that much different (2.4% vs 3.3% on average) - which can be (batch-auto)corrected in post.
The f/2.8 24-70mm lenses often have around 3% distortion anyway.
Each person's style of, and needs within photography is unique. I really miss the 71mm-105mm range when limited to a 70mm for a walk around.
My plan is have the 14-35mm f/4 L, 24-105mm f/4 L, and 100-500m f/4.5-7.1 as my 'trinity'.
I have a bunch of EF (and even some EF-S) glass that also goes well on the R5, e.g. 100mm f/2.8 macro L, EF 50mm, etc.
It's a great time to be a photographer, we have so much choice (just maybe not so much in our bank account to be everything straight away!)
Yes to all of this!
The RF 24-105 is much better than either of the EF versions. So much so that after a summer of schlepping my 5D4 + EF 24-70 f/2.8 around taking primarily landscape shots in France and California I was happy to switch to an EOS R + RF 24-105 f/4. Less weight for one-bag carry-on travel (not that I am doing much of that lately), and much better face and eye tracking for shooting people. For me the 70-105mm range is much more frequently useful than the additional aperture. If I need more light and/or less depth of field I have primes, and now with the RF 85mm f/2 IS half-macro I don't have to hit up my brother-in-law to borrow my old EF 100mm macro quite as often.