What about throwing another option into the mix ...?
How about pairing up cross with MTB?
I know that it wasn't the topic of the article that spawned this thread and would most likely mean a change of team, but hey ... this is a forum rather than the real world, so any option goes, right?
Anyhow, it'd be less demanding on the body than a road season (especially considering the design of most MTB courses - which are effectively road tracks anyhow) and keeps the dirt skills in there ... If he wants longer events, there are the marathon distances - and perhaps the odd road 2.whatever level race ...
Have to say, I can't understand why - other than tradition/conservatism - more cross riders don't put in more MTB mileage over the summer ...