There are many configuration parameters for LTIs (see the external tools API docs) that are only available to change/edit through either the API or through editing XML (LTI 1.0/1.11) / JSON (LTI 1.3). While this might be ok for initial installation of an LTI, it makes modifying a configuration very hard. Making changes through the API often has unintended consequences (changing one parameter might erase/change others, hardly any documentation around this exists).
I propose that *all* settings for an LTI be exposed and configurable through the Canvas UI. LTI 1.3 seems to be a bit better in this respect than 1.1, but there are still things not available in the UI (default placement for a course navigation item, for example). Exposing everything in the UI with all options obviously displayed and able to be easily changed would really help admins out.
-Chris
