DCS have recently put out F-86F and MiG-21bis modules
Yeah but not a world to "effectively" play with those aircraft/modules in. For example no Korean War (1950-53) map and associated units (F-80, F-84, F9F, Yak-9, B-29, IL-10, Sherman Tanks, T-34 Tanks, or even the first F-86 variants such as the F-86A and F-86E, etc, etc, etc...) to play in such a map/scenario.
Or something like a Vietnam map/scenario to play with the Mig-21 (and in this case you also have missing all the associated units) although I admit that somehow it could probably be possible to have a fictional late 70's or 80's scenario within the current DCS map and units, if someone decides to develop it that is (in the form of missions and campaigns for example).
Incurring the risk of rising here an issue/discussion so often discussed in these SimHQ forums, it doesn't matter how well made and realistic an aircraft is, a single flyable and greatly modeled aircraft by itself doesn't make a combat flight simulation a "good" one. Actually a well made and realistic flyable aircraft is only a small part in the equation for a "good" combat flight sim, this IMO of course!