UNA automatic System emails

I have a feature request, and a related question, and possibly a "weirdness report" - all in one!

1: Feature request

Our previous community site was set up via a Wordpress plugin - and in comparing the Wordpress plugin to UNA, automatic emails is the one and ONLY area where Wordpress was a lot better. It was possible to add new automatic emails that would send to members. The "add new automatic email" window would let you choose a trigger - IE "membership level changed", and also which membership level the email is sent to - which made it possible to have emails that only send for specific membership levels.

Finally, there was a list of automatic parameters that could be used in emails to get info from a person's profile/account into an email. I think this is another huge difference between our Wordpress plugin and UNA - all profile fields (including custom ones created by site admins) had an ID which allowed them to be inserted in emails. I think I saw in a discussion elsewhere that UNA profile fields don't have ID's, so it's not possible to call them up other than in "profile info" blocks.

It would be amazing to have a "create new" button under Polyglot > emails, or at least the ability to better customize the email that sends when a membership level is changed, so that it's a different email for a different membership level. Which brings me to:

2: Question

Is there a custom parameter that can be used to insert a membership level's description into an email? On that note, is there anything that can be done with a membership level description?

I have added helpful descriptions for each membership level on my UNA site, but I can't figure out how to actually use them!

3: Weirdness report

When an existing member creates a new profile on the site, the automatic email generated by this action is the "Membership Level Changed" email. I have modified this email like so:

My modifications work perfectly for when someone's membership level is changed - the page describes all memberships, and the person can click the link to figure out what their membership level means. But it's super weird to receive the email in case of a new profile being created - technically the membership level wasn't changed - it's the membership that's automatically given to new profiles via Settings > Persons > "Default member's level to assign after person's profile creation".

If I could customize these emails by membership level, either by an actual custom email, or by inserting a membership level description, that would also solve the problem - as I could put an explanation in the email which only appears for the default membership level.