OK I have resolved this satisfactorily via unexpectedly easy route -
As windows has the ability to scale items anyway - I have been experimenting with using the option to scale everything up whilst keeping the native 1920x1080 resolution ( fwiw I tried lowering screen resolution but this resulted in nasty fuzzy display and loss of screen real-estate) - Thankfully - Cross respects the Windows UI ability to scale all dialogues and menus etc - so I have fine tuned the scaling to about 130% in the personalisation settings ( display) as 125% was still making the controls too small for touch screen and 150% was reducing the library area too much - am much happier now and get to keep the nice crisp 1920x1080 resolution.
I have to say I still prefer the silver/grey background and more spacious control area of Cross 1.7 rather than the more busy and cramped 2.0 with black background - it would be nice to have the new features with the old interface - but I guess you can't please everyone.
I have posted some pics up on the tips forum so you can see what I am whining about and the differences in display between various levels of scaling
cheers
pics here:
http://forum.mixvibes.com/viewtopic.php?f=355&t=24500