Cash Games and MTTs are very different and require different poker skill sets as you said. Once getting used to tournaments and how to play them, its probably very difficult to transition into cash games when you probably haven't had much practice with cash. Blinds stay the same, pressure doesn't fluctuate, bets can be confusing, and people can leave with a profit or a loss whenever they want to. My guess would be that you're having trouble with cash games because you probably haven't played quite enough, and simply need to learn the style and get more used to gameplay. But if you're looking to make more money faster, which I would assume you are, I think increasing the quantity and possibly buy in price of tournaments would be the best move. If something isn't broken, why fix it? If you have success in MTTs and enjoy doing it, then stick with it and don't waste time and money playing cash games. goodluck