Skill progress daily reset in last 2 days. Probably it is really reset daily in old version.
My teams have no super fast trainers now. Unless one of my players win man of the match, there will not no sp gain for the whole team after a matches because skill progress of my players cannot reach 100% through a match.
If players can gain some percentages with about 25% skill progress in new version, the difference in training efficiency between old and new version is really huge now. In old version, accumulated skill progress which is less than 100% will disappear in next day. If players are slightly further train to gain sp, they will not fit for the match in next day. In conclusion, players in old version is either improve slower because losing skill progresses, or are not fit in matches because of excessive training. Now I lack super skills to be able to compete with old version now.