I don't quite understand this "need."
A chain can have 16 patterns, and each pattern can be 4 bars. That's 64 bars. At 120bpm thats a bit over 2 minutes of run time. A two minute pattern that can itself then repeat. That's quite a bit really.
BUT!! Each scene can have its own chain. So with 16 available scenes, that's 1024 bars (about 8.5 min @120bpm). Of course, you do have to manually change scenes. Being able to chain scenes would be nice, but I'd hardly call it a "need."
Let's remember that the KSP is not intended to be a sequencer/arranger. Its design intent, as repeatedly stated in the manual and marketing material, is focused toward live usage. If you're trying to sequence and arrange an entire song with it, I kinda think you've got the wrong equipment. Plus it's clearly focussed toward electronic music, where 1 to 4 bar repeating patterns are the norm. Most electronic music doesn't have a typical song structure with verses, choruses, bridges, and solos. Again, wrong equipment for that.
I for one am LOVING this equipment. The workflow is fast and intuitive.
The biggest problem I've had so far is that the 2.0 update broke proper sync from a DAW with MIDI over USB. I haven't tried using other hardware for MIDI sync, but I've read that that's also broken. I'm currently working around that by using the KSP as master clock.