I think this is good advice. Getting DBJ's score is worth about 30 this round based on Sheridan's scoring to date, maybe 40 based on last year's scores. That's worth having, but not massive, and not worth a trade of itself, obviously.
Having Ueber I would guesstimate - I stress guesstimate - might be worth about 20ppg in the near-term. This could be higher/lower based on the factors I mentioned in my earlier post (alternative donuts, DPP pairings, etc - note Ueber's value declines somewhat if you remove guys like Brown, who he pairs with).
Sheridan is around fair value based on his scoring so far - although you can likely replace his points with a rookie in the <$150k range if you pick a decent one. So trading Sheridan is not pressing (he's not likely to drop a lot), but could free up cash for few/no points lost on ground, assuming you don't think he improves from here, and have a decent D7.
If Sheridan is on the block anyway, and if you don't expect to lose Ueber's swing value near-term (by trading out too many of his D-F mates soon), and don't expect to have other donut options near-term (unfit premiums, or rookies at risk of being dropped), I'd probably do this trade - more for Ueber's ongoing value, and the fact that you can free up cash but likely replace Sheridan's points with a playing rookie, rather than to get DBJ's extra 30-40 this week (although that helps too!).
Essentially I think the trade would probably net you at least 150 points from here, possibly a fair bit more, so it looks a worthwhile one.