Photos App doesn't import keywords that I exported from the app itself
I have a too-big library and would like to split them into smaller ones. So I exported a bunch of keyworded-photos from the Photos App, then option-open Photos and imported the photos into a new library, and all the keywords were gone.
I tried checking and unchecking the "Export IPTC as XMP" option when exporting but it didn't make a difference. No keywords were imported into the new library.
I've been seriously considering switching to Adobe's Lightroom because I don't want to keyword thousands and thousands of photos again. Does anyone have a solution for the keyword problem, or could anyone share some experiences on importing keyworded-photos into Lightroom? I already have the app as a full Creative Cloud package so if it's good with keywords (which has always been buggy for me since the iPhoto days) I'm sold.
Thank you in advance!
MacBook Pro with Retina display, OS X Yosemite (10.10.3), null