I am sure he has worked on his techniques but he really has to be selective in shot selection. IF he scores 50 even in one of these 2 ODIS then he got the edge on Jadeja for sure and if he shines in this series then he will prove handy in Worldcup which is again in India, I hpoe U do well Yusuf wish U LUCK.
Yusuf is definitely better option at 7 than Jadeja. Mostly Number 7 batsman come at crease in slog overs. So yusuf is more useful at 7. As a bowler I think Jadeja has edge over Yusuf. But India need a explosive batsman at 7.
If yousuf shows little glimpse of form then its better to pick him for number 7 than Jadeja; If yousuf fails then better to search for another;
In no case Jadeja should be picked; if no one exist other than Jadeja then Yousuf is better; Eventhough Jadeja's avg is slightly better than Yousuf but those average he made during India at loosing side; One cannot rely on both normally but when there is a situation of death where less balls and more runs which normally happens in ODI then yousuf keeps hopes alive;