I believe if you search more with in your arsenal, you will find more than just the standard locks that lead into throws. If your Uke is resisting, be "Johny on the spot" and throw a punch, an elbow, or a knee. One thing that annoys the hell out of me, is people not learning to use transitions. If something doesn't work right away, you have to have a clear enough mind to look for an opening. This could mean going from one lock to another in an instant, chokes, or strikes. I think a lot of people are afraid to get hit, and thus their technique suffers. There is NO perfect system. Sometimes the only way to survive is to fall back on to what you already know will work.