MultiFX Reverbs

I picked up a MultiFX and am wondering about some things.  There are two basic Reverbs (Reverb 1 and Reverb 2), and their parameters are each reverb time, high filter, and low filter.  This is unfortunate because there doesn't appear to be a parameter for predelay prior to early reflections: both reverbs have LONG initial delays, so neither of them sound like a room or even a chamber: they both sound like rock arenas.  :-( 

I would sacrifice Parameter 2 (High Filter) in a heartbeat in order to shorten the initial delay time.  As it stands I don't think MultiFX has any reverbs suitable for "typical" reverb.

What is confusing to me about this is that on the Wiki it describes the Par 1 knob in general as "Pre delay / room size".  But I don't think any of the effects have Par 1 as a pre delay.  Did something change?

Also unfortunate is that there are both wet and dry knobs, rather than a simple wet/dry knob.  One wonders if a new firmware revision could allocate one of those knobs to a Parameter 4 (for, for example, early reflections).