When I did that my plant looked a lot like yours, when I switched and started watering until runoff, it ended up fox tailing on me and pretty much ruined the whole grow, I do not know that I can suggest changing you watering practices on this grow. ( Definitely need to change on next grow) I don't know if that will happen to you or not but might be better to keep watering the way you are and finish it off like that?? I don't like the suggestion to continue doing it wrong, but after mine fox tailed I wished it didn't, so for now I am not going to give a suggestion on if you should start watering fully or not. That's your call, but next time absolutely fix that issue it's a big one.