Well hold on. Clearly I know the advantages. Just meaning, the longer barrel is for aided aiming. The flip/rise of a 4" barrel and 5" is pretty subjective for having any difference. A G26 should hit the same as a G34, first shot, with a red dot? Would the average non collector benefit from buying both a Glock 19 and 17 AND adding red dots to both? No. Very common for the G19 to be said to be as accurate as the 17 for many. Point being....
The longer barrel flip can be overcome by weight (X5 adjustable weights, picatinny weights, tungsten guide rod as an example). Say you send your CZ PCR to Primary Machine for a red dot milling. A red dot pcr should hit the same place as a Shadow. (agreed, agreed, you need to spend about 1k in Cajun Works stuff to make the PCR good, but that's a CZ problem).
Just wild thinking, but the red dot is just such an obvious afterthought to it all with massive bulk. I have no idea what it could be, but one could imagine a future where slides have this integrated set up. I guess until then, the perceived best gun in a class is always going to just be better with a red dot.
So when Walther adds bulk to their flagship 4" "Compact" and have the same bulk on the 4.5" and 5", just to get a red dot on it? Blah. Blah on you Walther
PS. Walther P99 just went up in price this past week. So The PDP was an intro Walther charging more.