I would argue that Reach shows just how dull bungie of newer years are. Especially with Sage at the helm. Difference of opinion and all but Reach is what makes me totally lose hope for Destiny.
I think Bungie suffered from creative fatigue with Reach. Destiny project was underway and Reach was just another Halo.
Also, i think Bungie tried gameplay concepts for Destiny in Reach, which didn't necessarily mesh too well with Halo (alternatively they made the concepts for Reach and decided to use them in Destiny, or perhaps they just ended up with similar things in both games by coincidence but i doubt these possibilities).
I get your feeling though, i'm very, very careful about Destiny (or anything by Bungie after Reach), especially coupled with the fact the gameplay so far has been kind of boring if not bad.
Good thing the world's damn interesting, might end up being its saving grace. The world and the concepts they're using for it are enchanting,
adventuring in familiar yet mysterious places...
I don't think Halo CE a superb game but the thrill of adventuring in a mysterious (it is a frigging ringworld) yet familiar (Earth-like flora and geography) place felt great, something Bungie didn't really recapture with later Halos.
(343i did manage to evoke the feeling with Requiem but didn't keep it, there was no mission in Halo 4 where you just walk for a long time without any enemies, just you and the environment)