Don't know how many of your institutions render EAD on the fly via web browser, but you might be interested in this discussion:
This thread within the "blink-dev" discussion for Chrome's new rendering engine ... examines the possibility of removing support for XSLT from the browser. If so, Blink would be the first major browser to remove support:
There is some discussion of usage on the web at large, but note Eric Seidel's (of the Chrome team) comment from 4/23:
"My suspicion is that neither can be removed from the platform at this time. But both are probably good opportunities for later removal or replacement with JS-based polyfills. I expect removing the need to ship libxslt as part of Chrome to be a small (but non-trivial) binary size win."