Rode 38 matches in 2012 for 7.58 and came back in on that average towards the end of 2013.Assume that's what he finished up at 7.37.That was his stated final average in 2013 green sheets .
Unfortunately Britain has no strength in depth and would be unable to come up with your suggestions without diluting the PL to virtually NL standard.I have no doubt it would produce good racing and meetings ,but you would probably have to reduce admission prices to compensate for the standard of product on offer.Speedway in UK has big job on its hands to produce riders that will bring us to the top of the ladder again,probably never IMO.
You also said not riding on a regular basis could be a problem why?that is what I am reading into your post.He will be riding in Britain and Sweden this year so should get back into full swing.
Seriously,Your not trying to say that Seb will have forgotten how to ride a speedway bike,if he is focussed on a comeback he will probably end the season as our no1 IMO ,that's the chance the Promotion are taking and you can't blame them as he is an asset.