Sub-Odeon is the best FASA site I know. You are right that it would not be much of a contest between ships of the different eras. Its always seemed to me from watching TNG and DS9 that there was a quantum leap in defensive capabilities and thus I made sure the ships can take a pounding, which fits with the on screen evidence when compared to the TOS. The stronger shields combined with the Structural Integrity Field allow TNG ships to really hang in there. Plus I never liked how the FASA rules never allowed for a ship to take even a single volley without a shield breech, this does not fit the on screen evidence.
On the other side of the coin, I had to develop ways to increase fire power to both compensate for the heavier defenses and the on screen torpedo volleys, thus those additional rules.
As for the Tholian web, well the ship is my own creation, but I did not come up with the web rules. I just checked to see if I could find the location I downloaded them from and I can not find that link. In any case I was glad to be able to help.
"For to win 100 victories in 100 battles is not the acme of skill. To subdue the enemy without fighting is the acme of skill." Sun Tzu - The Art of War