This is the closest personally relevant neckbeard issue I have with this game, so I feel compelled to contribute to this certainly pointless intellectual circlefap.
I love the Atlas, particularly the DDC. It's a synchronous build, the ECM allowing you some opportunities to maneuver well within optimal killing range. You may even have buddies with you, since people like to follow ECM and big assault mechs (they're handy cover). I have the classic ac20 3xsrm6a 2xML build (and AMS, just to be a good guy Greg for the group). I personally feel the 2xLL build runs too hot and the artemis missles give a far better grouping; the mech is honestly for brawling. Leave the LL peak-a-boo cowardice to the lights and mediums imo.
Anyhow, I had great fun with this mech, and personally feared no other. 90% of DWFs I dueled were just overconfident fodder. The dakkawolves don't expect champion torso twisting, and the dual gauss just can't fire off alphas quick enough, or maintain accuracy when getting blasted in the face with salvos of srm. The chief advantage the atlas pilot has has always been the torso twist. Here's a controversial statement: atlai torso twist survivability is actually superior to the TBR.
Then BAP got buffed to 360m. Retired DDC

I bought a DWF for c-bills, and always played it in my off rounds (i.e. my team/myself got ggclosed and I ragequit the match). I appreciated it's raw firepower but was always annoyed with it's mobility. When I garaged the DDC a couple weeks ago, I played the DWF nearly exclusively. I got used to it's dumptruck-style handling, and discovered something shocking: the DWF owns all face in the hands of a capable assault pilot.
I run 2xgauss 6xML 2xlrm10a (and still even rock the ams, because I'm a swell fellow like that), the "All-Rounder" build. It's incredibly versatile, and about over 9000 times more deadly and versatile than the DDC (in my personal experience). The entire episode was kind of an epiphany for me: I discovered that I love clan mechs, hate feudal warlords, and much prefer genetically enhanced, transhuman warrior culture.
Short story long, I agree with the OP. The Atlas needs some kind of love. I think some ST internal/external armor buffing would work, and/or a couple hardpoint tweaks. If the chassis had the option to mount some more firepower, with some buffed STs, it would quickly recapture the respect it deserves. In it's current form, for all variants, it doesn't concern my DWF in the slightest.