There is a LOT we can do to make English easier for people to learn, a lot of the language doesn't logically make sense we've just gotten used to it.

All three E's in the word Extremely are pronounced differently.

Ex-treme-ly (1st e: /ɪk/ - "ik", 2nd e: /i/ - "ee", 3rd e: /i/ - "ee" sound or unstressed).

All the C's in Conscience are pronounced differently. The language is a mess, and that's okay. Languages evolved over time based on how people speak and write, I doubt Þ and ð is going to get adopted by the masses