Is there an easy way to see if I'm missing any Logos features?
The usual way is Full Feature Upgrade, The hard way is work thru the About Logos in your Logos (but that's desktop only).
Building on DMB, go to Full Features (https://www.logos.com/product/228476/logos-10-full-feature-upgrade) and see what you own and don't own.
Take a PDF 'cos 1 day some of these will find its way into subscription through a different name. If not, when you see me in Heaven, you can shove me down to Hell[:D]