Yes, I agree, she is ready for more A time and the problems you are experiencing now are probably due to UT.
You can increase her A time gradually, by 10-15min every 3-4 days till you are at 4h or getting better naps.
If you prefer a long AM nap then your day can look like this:
6:30 WU
10:30 Nap
12-12:30 WU
16:00 PM nap for 30-45min
19-19:30 BT
Now, this is just an example. We also did a long AM nap and this was our routine when DS was 11m. But every baby is different, she might need her PM nap earlier and have a full A before BT, it's just something you'd need to try out. What do you think?