One thing Battlefront:WW2 does really well is artillery. In fact I've never seen a better system in a WW2 rule set. Really reflects national doctrine for artillery.
(e.g. whether you can use a concentration, or in the case of the US, Time on Target bombardments, speculative fire at terrain features, smoke, mixed barrages, you name it). It also handles airstrikes pretty well.
Rapid Fire is a skirmish set pretending to be a high level one; version 2 is a bit better but doesn't really solve the underlying problems.