I wouldn't call the compressor forward at all. It's not dark either though. If anything it's balanced. It's smoother and more colored than an original 33609 to my ears. The 33609 sounds a bit cleaner and brighter (10khz ish) than the 609CA. The overall coloration is similar to the preamps, rich mids etc. I wouldn't use the 609CA on all two bus applications, sometimes I'd want a punchier SSL style or a variation on the VCA theme like a Foote P3S. For any kind of blues, jazz, alternative/indie rock, folk I think it's a winner.
For harder hitting electronic music, fast metal, you might want a harder hitting peak type compressor by itself or in combo with the 609CA (compression off or subtle leveling utilized). But I'd be ok with just running the audio through the 609CA just for it's color, especially if you don't have tape or a bunch of other colored outboard gear in tracking and mix. Think of it in the same category as a Vari Mu; sometimes it doesn't work, sometimes it's magic. Sometimes you want the color of the circuit, but want a different style of compression.
A lot of the new music I'm hearing these days is too clean for my tastes (and I think for a lot of people's tastes based on how much searching people are doing for a 'magick box'). I don't think it's just an ITB vs OTB issue, I think it's choice of tools and methods and people are being too conservative with committing to their choices and aren't utilizing and combining enough different gear to make things sound great. 30-40 years ago a single track of audio would get passed through so much circuitry by the time it made it to the master tape.
My point is, this piece is one of those pieces that can help the tone come alive, and other than classical music, I could say would be a good stamp all over an entire album in combination with other pieces of great gear. It just happens to be less of a one/two trick pony in terms of how flexible the compression and limiter are than some other more colored classic pieces are (La-2a, 2254, TG-1, even the 1176 which isn't as much of a workhorse as it's portrayed to be IMHO <-- all of which I love BTW but often get put in series with a complementary compressor to pick up the slack in functionality but not the tone).