Jones stressed Lake and Morgan leaving Ospreys was because of the current uncertainty engulfing Welsh rugby.
“This is not a reflection of the Ospreys, of their love for the team, team-mates, staff or supporters,” said Jones.
“This is a professional decision based on their futures as rugby players. There’s so much uncertainty around the Ospreys as a team and Welsh rugby in general.
“At certain points in the season, you have to make a career decision based on the facts you have in front of you. The fact is at the moment the future has not yet been clarified.
“They’ve had a lot to think about in a short space of time. An awful lot of people saying an awful lot of things.
“They can only base that decision on what they actually know. It’ll be our loss and Gloucester’s gain in the short-term.
“It will also prove to be an opportunity for others to step up and show what they can do in those positions.”
Jones is confident there will be some positive news about players staying in Wales, with Ospreys duo Morgan Morse and Harri Deaves signing new deals this week.
“I’m confident we’ll have some more positive news around our players,” said Jones.
“We’ve made a huge focus on our retention. That’s been the strategy to make sure we secure the players we’re allowed to.
“The WRU are allowing us to secure certain players of a national interest,
“They’re securing those contracts, so we’ve been targeting those players initially and Jac and Dewi were part of that.
“We’re comfortable with where discussions are and hopeful we’ll have some good news in the coming weeks around our re-signings of our key talent.”