I study Danzan Ryu, which is very similar to Hapkido. There are lots of wrist locks, we like to finish our throws standing... (the arts are actually very similar) If you go to some older forums, you can find my posts talking about the merits of wrist locks and remaining on my feet when throwing. Then, something happened. I moved from California to Florida... there is no Danzan Ryu in Florida.
I started training MMA and BJJ. I learned some really interesting things. First, all those wrist locks we learned they don't work. After I accepted that, I thought I would try some of my throws. The guy was bigger than me, and had a bunch of MMA experience, so I didn't worry about him taking the fall. I set it up, stepped in and threw him perfectly. He went right over my hip, both feet way off the ground... No body told him he was supposed to let go of me. We weren't even wearing gis. He held onto my arm and waist as he went over, I hit the mat right after he did and he rolled right on top. Remember how I said he was bigger and had a bunch of MMA experience? It sucked to be me getting my perfect throw. (I got the feeling he did not appreciate the throw very much... )
I had to go back and figure out how much of my time did I waste, learning this DZR stuff that didn't work. I am going to skip ahead here, but this process took a while, don't over look that time. But, I finally realized that it was not the art but me and how I trained. I had done very little pressure testing and very little time rolling compared with other arts. (the real sad part is that Okazaki did lots of randori and took style vs style fights over in Hawaii)
First, look at your wrist locks. You grab the other guy, and he escapes. If you are like me, you grabbed his wrist put it in a lock and stood there statically expecting a result, thats how we practiced it. Then he escaped. Lesson one, move your feet. Get your grab, and apply your lock, but listen where he is going and move your feet to keep you in the right position. Lesson two, listen to those wrestling, MMA, BJJ and Judo guys... they will teach you how to grab an arm, an elbow or a wrist from an opponent. From there, you can find your wrist lock, arm lock... sometimes. Here is the big one though. You grabbed him and he escaped. The important part is that you made him respond to you. You took the initiative. Look at how they escape and counter... its setting them up for another of your attacks. Learn how to counter the counters. Also learn that you don't have to succeed with a technique for the technique to succeed. If all you do with your grab is upset his structure and balance, before he escaped... thats quite a bit actually. In the end, I got better at getting my DZR wrist locks... though they are not near 100%. What did become 100% is I can use them to take the initiative and set up some openings. (sometimes I can even go through those openings...

) Lastly, just because you learned it standing up, does not mean it does not work on the ground. Or with a different limb.
For throwing... I still think that its best to remain standing after. You can move on to the next guy, run away or choose between many different finishes as he is going down. But, in the real world, its really hard to do. So, while I still practice for that, I always expect to be taken down with the throw. I have spent time learning to go with it and respond accordingly. Whats interesting is that my throws have gotten better, after accepting a more realistic view of whats going to happen. I have also gotten a few in sparring, where I remained on my feet. The key to that, was having been dragged down by so many of my throws, that I was able to feel what I needed to do to remain standing... if that makes sense.
The best thing I ever did for my DZR training... was to have some guys beat the crap out of me. It changed my view of what I was learning. It changed my expectations. It changed how I practiced and applied my arts. I believe, it brought me closer to how DZR is supposed to be. I would highly recommend that folks get out of the house, and go find different styles to kick your butt. The different styles will break you in different ways. But if you take the time to figure out what happened... and look into your art, you may learn some really cool things about your art. You may even get better at it. Worst case is all you get are some really cool friends to train with.