Darren and Lilia have proved their abilities as coaches, choreographers and dancers on the show. They are also experienced at show dances and organising productions. If they dont hire them, it will basically indicate that the producers have lost the plot.
The current information we have could still work - in my opinion, but it depends on the quality of celebs being better, and the Show dancers being given enough time, budget and freedom to produce the goods.
We have seen a Hip Hop flavoured Samba from Matt and Aliona, and a ballet flavoured Jive from Ian and Darcey. That is the way I think they can stretch the boundaries. I dont want to see non-ballroom related dances such as Street, unless they are in the form of a flavour to ballroom or latin.
We need a better Strictly, not a changed one.