Again, thanks everybody for your thoughts and suggestions.
Have had a couple of more Shadows v. ISA games at about 8 pts. battle and while the Shadows have done better, the ISA have not lost a game, regardless of who is playing them.
I provide a few further thoughts and observations for your consideration.
Now that Shadows can suffer the effects of criticals, they are very susceptible having only one weapon system (assuming FDT and JPD are not weapons systems) and one arc of fire. Additionally, we have found that it is not really that difficult to stun any but the Ancient and then it is all over but the crying. Send in fighters or use a WS to knock out the shields and then with another WS or two and a little bit of luck....Boom.
Personally, I think the beam should return to being turretted. The series seems to show the ship sort of rotating as it fired its beam. Also, would like to see some 2 or 3 AD short range accurate weapons system or AF. That would make up, in part, for the lack of initiative sinks and the restrictive fleet list. Ripples suggestion regarding double use of the main beam has some merit but not being accurate, can't see them having much/any impact on opposing fighters regardless of range.
Fortunately, being stuck out here on the Canadian praires, we can houserule whatever changes we want and nobody else need worry about it.
Anyway, time to make the Shadows the feared opponent they are depicted as. As always, I look forward to your (collective) thoughts.
Kent