I personally don't think the club has focused too much on Split Enz or Tim, and there has certainly never been a lack of focus on CH. Just looking at the club releases for example, there have been far more cds by CH over Tim/Finn Bros and there has never been an Enz one in the original run of live cds. And there were always tons of CH photo sets, badges, dvds, video newsletters, things like the necklace, belt buckle, signed stuff, books etc.
It could be the fact that during the CH hiatus (2 of them, years long!), it might come across as the club not focusing on them. But what can it focus on? There is nothing happening in those quiet periods. Thankfully, that should all change this year with the hive of activity around the corner.