SRBs in this game are pathetic. Liquid-fueled engines outperform them any day, even though real-life SRBs are incredibly powerful. For example, the STS SRBs were roughly twice as powerful as the F1 engine. However, if I was to build a perfectly scaled STS SRB in-game, it would be pathetically underpowered and would probably have a fairly low TWR. This makes SRBs pretty much useless in-game, as it's just easier to use a liquid-fueled engine.
Agreed. This should be considered.