I love the GUNBOAT as much as the next X-Wing fan. It's bringing cool new mechanics to the table, in a frame that doesn't immediately yell "OP!" when thinking of builds. It does, however, have some serious power creep going on.
A Scimitar Squadron TIE Bomber is 16 points, and 18 with the auto include Extra munitions. Given the low flexibility of the dial, it's hard to get off more than 2 sets of munitions before being killed. It has 6 hull behind AGi 2, which isn't actually that bad, but prone to crits.
A Nu Squadron GUNBOAT is 18 points, has 7 total hull behind 2 agility - putting it into Integrated Astromech T-70 durability range. It has the SLAM and Reload actions, 2 of the best in the game, with the ability to fire weaponry after slamming. It has a better dial, upgrade bar (sans bombs, which the Bomber sadly never uses), access to EPTs and more appropriately costed pilots.
If you wanted to field a squadron of 4 Imperial ships, the Gunboat is now a clear winner, even with ordnance lists. The generic bomber pilots have been totally outclassed (there's literally nothing they can do that a GUNBOAT can't do better, and at nearly the same price). The Reload and SLAM actins keep the Gunboat in the fight for far longer than the Bomber, and the increased durability, combined with ac-dodging capability means that they're going to last a long time in comparison.
It makes me sad that in order make new ships good (and not necessarily even great) FFG has to relegate older ships to the scrapheap.