I don't have an issue with other people putting it in their signatures, I usually only look there to know how to address any follow up emails.
I don't have any pronouns nor do I use a title in emails - and yes, I have a debatably unisex name, it's part of the point of it. I can't remember the last email I sent where I needed to use pronouns even when discussing other people - I usually use their names, job titles, relationship to me.
I do have an issue when I've had conferences where I've been expected to use titles and pronouns and when in online meetings where pronouns have been used in brackets because I've noticed that my name pronunciation guide, also in brackets, is more likely to get ignored.
Continue performing your gender in more physical ways so people can guess it without asking
You may call it a performance, but seeing how they're interpreting me is (at times useful) feedback for me, especially online where they are few other cues. I'd rather see how someone genders me.
Do you call other parts of identity a performance? Cause I have people guess my ethnicities wrong all the time by physically looking at me, but I really wouldn't suggest calling that a performance.
But pronouns in emails seems to be to be an easy step in inclusion, so why not?
I get the motives, but the argument for inclusivity too often assumes one way of being trans or otherwise dysphoric. Gender dysphoria can be complicated and for some of us, being asked to nail our colours to the mast upfront increases dysphoria.
When others do the pronouns in an email or in brackets in an online meeting, it tells me that this is something they think is important about them and when others ask it of me, it tells me that they think this is important information for them to know about me and sometimes I find that questionable, other times anxiety inducing.
People used to do it all the time with email signatures that said Ms. Evelyn Smith or Mr. Evelyn Smith. Does that make you uncomfortable?
Other people doing it, no; however, I've been uncomfortable when I've been made to use a title or someone else has applied an assumed title to me when I've given none. My preference is to be called by the name I give.
I actually have been debating how to request a title be removed from a website that lists my name. Previously it didn't but over the summer a title has been put on everyone and I really dislike that that's how I'm being represented when the actual bio I gave still hasn't shown up. It's frustrating that that was given priority, but as the website design is already at a crawl, I've so far remained quiet.
And changing your name is a bigger step
For some it is, for others it isn't. This depends on the person.
I've found my name change rather easy -- I've used multiple names since I was little when I first started planning to change my name, but when I've been asked about my pronouns, I don't know, it sets my brain off. It makes me feel I must be doing something wrong that they need to judge me on, which is something I've heard from other dysphoric people as well - some trans, some not. I'm not sure the rise in popularity in doing this will help much.