Oh how I wish that were true But no, we only get to add chiefs to ripper/terradon units. They don't really invent rules who are already hammered down, they just fix stuff GW seems to have overlooked. So frankly yes, they should be licensed to re-invent the entire troglodon...
Is there a web page where we could see those SweFAQ rules? Maybe even in English (I know that as a Finn, I'm SUPPOSED to know Swedish, but alas, that is not the case. Shame on me, really.). I'd be interested to see what kinds of amendments you guys make. Also, as much as it seems that Chiefs on flyers should be able to join Terradons/Rippers (especially Tiktaq´to) and that it seems to be a mishap on GWs part to forgot to add a rule for that, it is not the case. You can always, in a friendly game, ask your opponent if they are ok with it and play the way it was "meant" to be, no harm in there. It seems we Lizardmen players have to do that a lot. But if your opponent says no, for whatever reason, I don't see anyway you could show from the Rules-As-Written that you can. People don't have to buy Tiktaq´to, he comes with the Terradon/Ripperdon pack.