RE: Maintaining strength or getting weaker?
You should feel very very lucky that it is minor. Have you gotten it checked out by a specialist? If not it would be a good idea. Also more than a week off might be smart or if you dont want to listen i would go SUPER light (i mean really light) for a few weeks atleast. Your rotator cuff might be very minor at the moment but if you continue to aggrevate it then you could turn a minor injury into a major injury over time.
Also look up exercises for your rotator cuff and start with them REALLY light and progress. Only do this once your rotator cuff is feeling better. The best advice i could give you would be to......
1. Wait till your rotator cuff is feeling better before doing anything else.
2. When you do begin I would do just VERY light rotator cuff exercises for a few weeks atleast.
3. After number 2 then start back into pressing and other movements and start LIGHT again to make sure it's ok to go.
This might sound much too cautious and might even seem like you would be wasting time. But you can ask most people that have a serious injury from lifting and most will tell you that it started out as a minor pain and they thought they could work through it and it would disapear. But surprise it got worse and now they have a serious injury that will be with them for probably the rest of their lifting career.
Remember to think long term, you have alot of lifting ahead of you, this is the wrong sport if you are in a rush.