
Breath of Fire IV is certainly an excellent game. On a very technical basis, it's probably a better game than BoFIII, and I think it's probably considered the best BoF game overall. It certainly doesn't have the camera issues that III does since the camera is fully rotatable in IV. III just stuck with me more.
Whether a game aged well depends a lot on who made it. I felt a lot of the better PS1 and N64 games did age rather well. FFVIII, FFIX, and the N64 Zeldas aged rather gracefully in my book.