@happygolucky, since you said you are just looking to get into modular, I will point out some things that may be new to you as a newcomer to modular. If they are obvious, please forgive me.
— modular controls are not all equal. Different controls may have different usable ranges. Those usable ranges may change depending on the patch you have at the moment. Most module designers tend to offer a usable range for a control PLUS considerably more than that, so that users can explore and creatively “misuse” modules also.
— what does this mean? Let’s look at some of the controls you are mentioning. Pitch control is normally volt per octave. So a 15 volt range gives 15 octaves! A large keyboard is 88 keys or roughly 7 octaves. So Odessa has a pitch input range roughly 2x that of a piano. There is almost no musical use case that uses that much pitch range. So IMO you will be fine if you are limited to less than all 15 volts of pitch control.
— practically, you would normally be driving oscillator pitch with control voltage coming from a sequencer or some alternative to that. If you’re using a sequencer, you can tune that output up or down as needed on the sequencer itself. So your final pitch is a function of your sequencer setting and oscillator setting. You’re not reliant on the oscillator settings alone.
— what about the other control values on Odessa? I personally can’t remember a patch where I’m using the full available range of any one parameter. Rather, there are “sweet spots” in and around the patch and the challenge is to find those and constrain the modulation to move around the sweet spots. If anything, I want a type of “modular microscope” that makes small settings and small changes easier to hit. Practically, something like 4MS SISM is extremely helpful to take a modulation source like a LFO then use scale and shift to constrain the modulation to a range that is musically appealing for that particular patch.
— In the broader picture, if Odessa is inspiring to you then yes look to creat a rig using Odessa with enough supporting modules to make it shine. I have Odessa but have not spent enough time with it yet to have a real sense of its possibilities. So beware it is fairly unique and IMO pretty deep. But it is cool IMO and the manual is good.
Not sure if this speaks to your question or not but I hope at least some of this helps. Cheers!