I've never used game salad but I did look at it when I was trying to decide what game maker engine to use. From all the research I've done, the only game maker engines really worth using seem to be Game Maker Studio, Multimedia Fusion 2.5 and Construct 2. And it seems to be in that order too. MM2.5 and Construct 2 are distant second and third after the popular Game Maker Studio
I'm not sure what's easier to use between GS and Construct. I imagine, any program you pick, your still going to spend weeks, months to years learning the ups and downs and in and outs of the program and basic logic.
You should probably ask this question on Reddit or tig source for more in depth responses