Personally me like the current variant.
Yes it is about personal preference, but currently these tags
no agree with Nick. I think it's simpler to undesrstand what is treeModelAdaptor rather than model (and actually it's adaptor and not a model) and recursive word alone also means something for you only because you know what is that. But it will mean less for newcomer.
About amount - I do not think it will growth much
Ok guys, you convinced me, considering that newcomers have to know out of the box what's going on is here priority.
Also I think that adding new namespace can be reasonable in case of highly used tags, but probably not here.
(Just note that I suggested improvement to tree:model and tree:recursive which gives me sense well.)