I share the same sentiment entirely. Battlefield Heroes attempts to take "the fun elements" of BF1942 and put them into a highly accessible format, but fails in that it fundamentally misunderstood why the previous Battlefield games were so popular. BF1942 was fun because the vehicles were easy to operate, but had the right balance of real world and cartoon physics to make the entire interaction fun to play and watch. The bugs and idiosyncrasies of BF1942 also made the game so memorable; the planes could be taken to surprising altitudes and reap destructible mayhem as they descended, the vehicles could drive recklessly down hills and off cliffs for cool crashes, and c4 packages could be used to propel units and vehicles to hilarious heights.
BF heroes has the appearance of all of this but lacks real substance in gameplay. The vehicles are crippled and the interface is much to be desired. It is boring, clonky, and unfun. BF fans will inevitably have to wait until BF3 (or BF1943) for a real taste of nostalgia.