Hi. You can do this (your second wish) now. If, somewhere in your email text, there is an underlined Date/Time, you can long tap it and an option to Add a Calendar Event appears. Siri will also try to search the email for context clues (e.g. location, length of event/meeting, etc.) It is usually pretty good at it, but sometimes you'll need to update some of the Calendar entry, especially if the location isn't obvious, or if there are multiple Dates/Times present. But it's still much easier than trying to manually revert back to the email and add the calendar entry.I want them to talk to each other! I think Reminders would be much more useful if I could add them in the calendar. I would love this! Also, I wish I could just make an email into a calendar item, with detection for meeting times and other info.
Hope that works for you!