I have been using Locus as my exclusive geocaching tool for some time now. It is the best tool for this sport that I have ever used.
The one thing I would like to see improved is the number of clicks it takes to start looking for another cache. It currently takes me a minimum of 6 clicks.
1) Click on a nearby cache on the map
2) Click on the navigation button
3) Click on 'Guide on' (which i frequently miss and hit 'Navigate to' causing many more clicks)
Now I have the cache selected but I want to see details
4) Click the navigate button
5) Click the information button
read cache info
6) Click back or home button to get back to the map.
Back to map with cache selected and guidance on
OR
1) Click on a nearby cache on the map
2) Click on the information button
read cache info
3) Click on Compass which I don't really want yet but it happens to turn on guidance
4) Click Back
5) Click back
If a 'Guide to' button were added to the bottom of the full geocache page (not the popup)
1) Click on a nearby cache on the map
2) Click on the information button
read cache info
3) Click 'Guide to'
Back to map with cache selected and guidance on
Additional, If I could long press or double click a geocache on the map this would be only two steps.
1) Long Press takes me to full cache page
2) Click on 'Guide to'
hmm, not sure if new improvements will be liked by you :) but I added all three items as submenu to geocache screen instead of compass button. So now when you press on compass, you'll get popup window with "compass, guide on, navigate" buttons ...