The legibility issues you sometimes see in images don't often crop up with either the SMP or heritage imo (although I've only handled the SMP on a handful of occasions as opposed to worn it). These dials CAN catch and reflect light in a way that makes them hard to read, but you have to willfully do it, and you can do the same thing with reflections off of a regular black speedy if you really set your mind to it.
The blue indices are highly legible, the hands are reflective and bright, and the lume is honestly out of this world- it's bright and crisp and pretty.
Legibility should not be a first consideration with this one- I think whether or not you want a traditional colorway or something truly mouth-watering to look at should be the prime consideration. You said that you wish there was a splash of red- there's nothing wrong with preferring the traditional blue dial SMP.
FWIW, My summer blue gets significantly more wrist time than my speedy (and don't get me wrong, I do love my speedy!).
Last thing: in every instance I have seen someone talk about legibility issues, it has been a concerned voiced without any actual experience outside of a boutique. I will say that before I picked mine up I had a similar thought, but I have had no legibility issues in any lighting condition.
Edit to add: I actually find this steel case back to be very comfortable. It shaves about 0.1 mm off of the heritage height, I assume it does something similar with the SMP.
Tagging
@pdxleaf for thoughts on his PO.
