Sen John Morse's seat did go to an anti gun Democrat, Mike Merrifield. But Evie Hudak's seat is currently held by a very pro-gun Republican, Laura Woods. And the person holding Sen. Angela Giron's old seat was replaced with a Democrat, Leroy Garcia. Sen Garcia has a mixed record on guns, when he was a Representative in the Colorado House in 2013 he did vote against final passage of the high capacity magazine ban, and against CBI charging gun purchasers a tax on their purchase. Then Rep Garcia did vote for the private sale background check bill. He also voted against HB 13-1226, which would have barred CHP holders from carrying at colleges (that bill passed the House but was killed in the Senate).
So three anti gun Democrats were replaced with one anti-gun Democrat, one pro-gun Republican and one Democrat who has a mixed record on guns. The pro-gun Republican also represents the one vote majority Republicans have in the State Senate, a change from before the recalls when both chambers were majority Democrat.