It's all in the quality of the play not a 10 point upgrade card.
So a 134 (minimum) point ship, completely optimized against this particular threat in a way that, btw, is largely neutered against many popular fleets (I'd rather not get into XI7/AP again), has a chance of not being one-shotted by a much cheaper, much more flexible and widely-useful ship... And everything's okay, nothing to see here?
Seriously?
Yep that is exactly fine, because this fleet came about due to Ackbar/HomeOne/TRC.
Remind me again which Rebel ships don't get played? Remind me which Rebel ships get told "always take ECM" or "Don't take that version it has no slot for ECM"
Remind me which Rebel ship gets several threads "VSD still useful/redundant/etc?" because it became a total and utter point pinata for the no brace trc spam fleets.
Remind me which is still the most popular Rebel Admiral at tournaments, which is the most used TL upgrade card.
And I'm sorry man, but adding Advanced Projectors is all you need to do to have your MC80 survive a Demolisher triple tap, that is hardly building your entire fleet to counter a threat, because what do you not see in an Imperial 5 ship fleet?
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You guessed right! X-17 Turbolasers.