I definitely think Disney has lost its way in terms of its films. It was inevitable, they simply ran out of source material. They're supposedly working on Rapunzel now, but it just feels too little too late. For my money, they peaked with Beauty and the Beast and Aladdin. Lion King was a good effort, but just felt like something was missing. After that, their entries just felt forced, like Hercules and Hunchback of Notre Dame. Seriously, what was next, Phantom of the Opera? (To be fair, though, I thought Lilo and Stitch was brilliant).
As for good stories in general, the fact is, there's only 32 plots that have been used through and out history:
The Lion King is Hamlet,
The Lion King 1 and 1/2 is Rosencrantz and Guildenstern are Dead (in concept),
Lord of the Rings is the Ring Cycle,
Swimfan is The Hand That Rocks the Cradle is Single White Female is Fatal Attraction is Play Misty for Me,
Grand Theft Auto is Pac-Man,
Star Wars is The Hidden Fortress,
The Savage Land is Pellucidar (Sauron is a Mahar),
The list goes on,
Some get mixed to create a little variety, but ultimately the craft lies in disguising the inevitable truth of 'borrowing', and that's not an easy thing to do. It definitely seems to be getting harder.