Appleton remains unbeaten as the Seasiders manager after Thomas headed his side ahead after 22 minutes and Kirk Broadfoot wrapped up the win with nine minutes to go.
The goal was Thomas' second for Blackpool since joining on loan from League One Bournemouth in November.
And after seeing his side move to within four points of a play-off place, Appleton believes the striker is on the right track.
"Wes Thomas has been answering all the questions we have had about whether or not he can do it at this level, he just needs to continue working hard," he said.
"Nathan Delfouneso and Thomas Ince give us great width and can go past players and to have them available means we will always be a threat.
"We have defended well recently and I thought the back four were very good as was Matthew Gilks in goal.
"A few people got frustrated when we were drawing some games but now we are progressing nicely although I imagine there will be some comings and goings in the January window.
"It was a good time to play Blackburn here but they will kick on again at some point because they have the talent.
"I feel for Henning Berg as I would for any manager under pressure. It takes time to bring your own ideas into a club and bring in a nucleus of players that you believe in."