Re: feeding, there could be a couple of things going on: she could be more interested in the world now and eating less efficiently because she's distracted (which could be why night feeds are faster); she could also be using you as a pacifier toward the end of the feed. (she's bf, right?) FWIW my pediatrician said to "cut her off" at 40 minutes when dd was really young and taking a long time to feed, which I wasn't really comfortable doing, but I did make a huge effort to keep her awake and actively eating, kind of restarting the engine several times during the feed iykwim, and that made a huge difference in helping her learn to eat more quickly.
Cues become really tough to figure out from around 3 months onward. Around 3 months dd started to display sleepy cues in the middle of her A time, which was really confusing. She'll still do that sometimes, but she gets a second wind. When we make the mistake of putting her down at the first sleepy cue she's rarely tired enough to take a long nap. If you're regularly getting 45 minute naps and she's sleeping OK at night, it might be time to extend. You might find that some different activity will help to refresh her and help her make it through her entire A time. DD loves going outside and walking in her Bjorn, that always works like a charm when we need to extend A times.