Nah, the root issue with fw missions is their extremely high payouts and the ability for t3c’s, t3d’s and stealth bombers (to a certain degree now after the webbing npc addition) to complete a long circuit of them in relative safety.
Please remember that on asking for changes, we must consider the amount of work that must go into these adjustments by the dev team. You are asking for a complete rework of missions, I am not. These are simple changes that bring balance.
A Cynabal, though it might be able to quickly traverse the warzone, is not going to be able to tank many of these missions or do enough dps with a hardy tank. It will also mean many many Cynabals will die.
If you change the mission clearing requirements, or make npc’s smarter, you only increase the danger by a huge amount, as these missions are public warp points, much like the event combat sites like the guardian gala. So, if you make them harder/longer to complete, you should make them private sites that have to be combat scanned to find you in them. Without getting to deep into opposing views, I will again point to the fact that you are asking for changes that require testing and feedback. But force people to use navy and t1 ships, and you increase the danger and bring it into balance with the reward.