You don't have to care about what she releases recently if you don't like it.
I mean forcing yourself to like it will hurt your fandom even more.
I couldn't really balance my fandom priority when I discovered YUI... however as YUI's "HOLIDAY IN THE SUN" and "HOW CRAZY YOUR LOVE" didn't impress me much, I started shifting to K-pop. That made my Ayu fandom even more down, I once thought of selling away my albums. The K-pop boom was around Sunrise/Sunset released as well; I mean I liked the single but not Rock'n'Roll Circus (although I got the album). Then I guess around that time, I ultimately realized my devotion to Ayu, the feeling I never had since becoming a fan in 2004. I listened to old Ayu songs again after not doing so for a quite long period, and I started to complete my studio album collection.
Now I am pretty much out of K-pop bandwagon and only maintain my Ayu fandom. I realize that artists who write about themselves tend to have more longevity in my playlist.
I still listen more to old Ayu songs, but recently I am so into Party Queen and NEXT LEVEL. Sometimes, some songs just popped up in my head and I had the urge to listen to them. Her discography is so diverse and interesting.
And also, after watching her in a-nation, I realized that she is no other than just a human like all of us. She's always so unreachable for me, I can't imagine how she really exists in real life. I finally felt that "connection" with her! For a second, this even crossed my mind: "Why am I so into this woman? She is a human like me!" then she started singing A Song for XX and that made me cry.
After all, you decide your own definition of loyalty.
You may look after her recent career now, but you can be selective of what you want like or not. If it doesn't amaze you now, doesn't mean it won't in the future.