First off I guarantee NO ONE asks for this:
With security always top of mind, we've heard feedback from some users that they'd like to see "Powered by QuickBooks" to lend credibility to the link in the email, and especially for invoices that customers can pay online
The new email template is horrendous, either provide and option to revert to the old layout or allow for html editing so your lack of development/testing can be fixed by someone with attention to detail. I would never send anything to my clients that look this way, but currently I may not have a choice. This needs to be fixed ASAP!