Don`t know if this has been suggested before (know shortcuts have for this) but I would find it useful if the preset scrolling under instrument settings or on the DSP chain could be tagged onto the VST windows. This would save having to have the Instrument properties / DSP visible for preset scrolling. In fact having the volume control tagged on aswell (VSTi) would be useful but not as necessary for me if space/ difficulty were an issue.
edit: Just thought of something else aside related:
A % mix slider on all DSP`s, native + VSTfx, would be a useful addition IMO. Saving having to use send tracks for this.