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a non-disc hub will result in a less flexy wheel due to the greater flange spacing
The extra flange spacing, if any*, is on the NDS where there's already plenty on a disc hub. Deleting the rotor mount doesn't do anything for the DS where the actual problem lies.
*e.g. FH-M785 (disc) and FH-T780 (non-disc) have the same dimensions
gbj_tester-
Is that how it works? I thought that the wider triangle base makes a "stronger" wheel even if one side is still at a dodgy angle. Well, good to know anyway.
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Actually mathematically increasing the total flange spacing has a impact. In practice it works to.
So for lateral stiffness it is marginally better for the extra spacing to be on the nds. There is one 11 speed road hub u use with an asymmetric rim that has 16mm/49mm spacing. The resulting wheel is very stiff. Spoke tension balance is o.k and even with tubeless tyres mounted the rear nds spokes won't slacken off under load. I did a test wheel with the cooked vermicelli noodle that is known as the stans 340 in 24h drilling and sapim race spokes and the wheel is actually quite useable.
Still a rear disc brake hub generally has 54mm flange spacing or 55mm for the rear which is better than a DT Swiss road hub so your winning. And most 11 speed road hubs have 55mm spacing so no better really.
If we all went back to 7 speed or better 5 speed then we could have hubs with less dish which is mdcc testers point.
frankenbike
cycleclinic
Forgot to mention, if you're absolutely sure you won't ever use the wheel with discs then a non-disc hub will result in a less flexy wheel due to the greater flange spacing. If flexiness is not likely to be an issue for you then I guess you can ignore it.
It's got a tapered head-tube so you could probably find a second-hand (or Chinese) disc fork for <£100
Edit: also cable discs are under-rated and not too expensive. Not as cheap as cantis though.