Moved my reply to a comment about Combiner Wars Rodimus from the Titans Returns thread :
transformers-titans-return-product-reveals-news-updates-rumors-leaks-and-more--p1842338.php#p1842338To here.
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The Alternator/Binaltech Rodimus lacks the exhaust pipes too - as does the new 'The Last Knight' Version.
But had it not already have been mentioned I'd have pointed out that Rodimus Looks a little bit like the Micromaster version.
Also What I tend to do with Legions is look at them two ways - they can all be lumped together regardless of scale - I.e. Optimus & Huffer
Or you can look on the larger characters like Starscream, Megatron and Optimus as some sort of Commander class for legions.
Then the more typically smaller characters like Pipes, Cosmos, Tailgate or Bumblebee function as small version in comparison to a typical deluxe.
Rodimus can be either you can pretend he's Hotrod and is kinda small or Rodimus and pretend he's bigger.
But yes having a car mode does make him an odd one scale wise - I usually just put him with any other legion car as there are quite a few of them.
Besides it's just fun to make him have an axe fight with one of his repaints.
If the scale is the only issue though there is the option of the scout class size KO too. he's only a little smaller than a Combiner Wars Deluxe.
There is also the suggestion that the size of the normal one works pretty well with the KO Megatron, Nemesis, Starscream and Optimus too.
But otherwise he's just fine to use as a chest plate.