Oh, the sky is always falling on SDN, especially when self-loathing DO students are involved. Despite the mindless proliferation of DO schools currently, it won't affect you.
Be forewarned that the odds are still about 50% that you'll end up in Primary Care, and higher if you add in the typical DO-friend specialties like Neuro, EM, Gas, etc. "Mid/upper tier IM" programs tend to be anti-DO. Gen surg is a challenge, but doable. Just go in eyes open.
As long as there are more residency slots than bodies to fill them, DO grads will still match. However, it likely won't be in LA, Boston or NYC, but probably in Jonesboro AR or Kalispell, MT, and more likely to be at a community hospital than a University medical center.
BUT, being a grad from a well established school gives you a huge network to rely on! Western grads are a known product to PDs, unlike, say, ICOM or ICOM grads will be.
The students who will have to worry the most will be the ones with red flags, like Board failures or repeating years, which will definitely be a risk of attending a new school as a student with a weaker academic history. A good student will always be a good student, even at BCOM.