Congrats on the great napping!!! I would have been insanely jealous to have 2+hr naps when my dd was 7 weeks! How is she sleeping at night? You want to make sure she doesn't start confusing day and night. If she's sleeping well at night, I wouldn't be too concerned about the long naps. I know there's a lot of split advice on this one. 7 weeks seems way too young to move to a 4 hr EASY. Is she bf or formula fed? If she's bf, it's almost certainly too early for her to last 4 hrs between feeds. When my dd was that young, I made sure I fed her every 3 hrs during the day, so I did wake her. But I wasn't militant about it, so if it was 3 hr 15, that was ok by me. She really could only handle 45 min of A time (which included feeding and wind down), so that meant she could actually get a 2 hr 15 min nap in and still feed every 3 hrs.
With a 4 hr EASY, bubs really need to be able to manage 2 hrs of A time, and she's quite a bit away from that yet. I really wouldn't push her to that. If she's bf, you don't really need to worry about overfeeding - bf babies only eat what they want. Their tummies are so tiny and they digest bm so quickly that they really do need to eat frequently.
hth
michelle