This is the front page on the forum I use, as I see it on my computer screen.
At first glance, all I can see are blue, orange and green category labels in the topics column.
This change to your layout and greyed out text is, quite literally, giving me a headache.
So much space on the screen and yet the post topics and categories are crammed onto one column with the category labels standing out loud and proud and prominent beneath greyed out topic headings of the post for which the forum members are more interested in seeing and reading … it’s currently looking more like some new format of morse code your testing out.
There’s so much space just at the sides so why do you need to cram up the Topics column?
I’m seeing more category title than actual topic headings, which were just about readable when greyed out before you moved the Cat. labels.
And naturally, with the category label beneath each post it’s taking up twice as much screen length thus more scrolling down the screen than is actually necessary to read posts…well, if I could see them to read them 
Please bear in mind not all users have perfect 20/20 vision, which is why I can’t use smart phone or tablet, I have to use a pc with full sized computer monitor.
It would be fine if individual users could tailor the font size and colours to cater to their individual needs but we can’t.
So if we struggle or can’t read the greyed out topic titles as it is, then squeezing them between the loud’n’proud category titles renders the forum virtually useless to us.
The Topics column looks more like a shopping list washed out in the rain.
But while I’m on here could I put in a request please … you couldn’t move the skin tone bar of the emoji box over to the left a little so we can actually use the downward scroll button. It would be useful should the forum ever be rendered usable again 
Actually your own Discourse forum appears a little more user friendly…visually. Haven’t time to explore further 