Thanks for the feedback.
1. To achieve this you can select an object, pull down the Edit menu (or right click the object) and choose Select, then Same Type. This will select all objects of that type. Then right click, select Properties, and change the colour. All selected objects will change colour.
(There is an issue in the 2.0 release if your selection is very large; this is fixed in our 2.1 release, which is upcoming will be free to existing customers.)
2. Duly noted. The best you can do is to right click, select View SQL Script, and inspect the script visually for the reference. This gives you more detail than an indicator as to the type of dependency - of course it may be too much detail for you.
All the best,