Flight model is so good, there is heavy reliance on trimming and fuel management and electricals, which is also good systems modeling. Shes a handful and very challenging in flight and and during fighting.
No I dont think there is system redundancy if you lose a half wing for example, or worse, the elevators, if you compare it to A-10C. you will plop down uncontrollably.
IMC not too much as you only have TACAN which can be good for a fix if you use F-10 and lines method for dead reckoning navigation. No there is no TAD, but kneeboard is there for VFR.
A-A, it was designed to fight on par generation fighters, the most notable of which, is the Mig-21. Its not an air superiority fighter like the F-15C, but it has its tricks and usually its WVR and dogfighting you fight use mostly.
Countermeasures are very low quantity but also an important factor is your visualisation of threat and your response to a launcher. It does have an advanced RWR and I believe in Nevada, somebody created a dedicated and supposedly dynamic, Wild Weasel training campaign.
Very limited A-G role but yes you have dive bombing charts and sleds as well as videos.
It just burns fuel too quickly though imho. I am not surprised at all about that just stating.