Found a fairly useful little workaround today which might interest those of you who want glide in their step sequences
First set the following parameter values:
Mode = Up
Pattern = User
Oct Range = 1
Source = Arp Input
Destination = Transpose
Amount = +63 (max)
Osc 1 Keyfollow = Off
Osc 2 Keyfollow = Off
Set Semitone of both oscillators to the root of the key you want the sequence to be in - I find it easiest to work with a single oscillator for these kind of patches.
Portamento = 30 (approx)
Key Mode = Mono 4 (or 2, but not 1 or 3)
When you have done all this, set the Arp steps to the desired pitches. Velocity=64 will result in a pitch of middle C, every inc/dec by value of 1 will shift the pitch by a semitone.
For those steps where you want a glide effect, be sure to set Step Length to 127.
Now, if you just play one key, there will be no glide, but if you play two keys, you will get a glide effect wherever you have created a legato step by setting length to 127. The wider apart the two keys you play, the more intense the glide will be
The downside is that the sequence will be in a fixed key, so no matter what notes you play, it won't make a difference. However, you can still automate Osc1 or 2 pitch in your sequencer, or you can set up two custom changes via the pitch bender.
Oh, and be sure that the Amp Envelope Sustain is not set too low (or if it is, keep Decay relatively long) otherwise the portamento is switched off.