Savber100 wrote...
Arcian wrote...
Guanxi wrote...
5. Mordin's part is so small it wasn't worth the time/money
This is just blatantly untrue. His role is much bigger in ME3 than it was in ME2.
Agreed especially if you've read the leaked script.
Seriously, Bioware generally don't skimp resources when it comes to voice-acting. Hell, they even went as far as making a fully-voiced MMO. It confounds me that they would ditch the VA of such a central actor (assuming that they have). 
As has been said a million times over, all voice actors are not hired straight away because:
1) Conflicting schedules. Some voice actors may need to record their lines very early on due to having other projects later on and vice versa.
2) Changes in the script. It happens. A lot. The later they begin to record, the less time they will waste recording lines that will be rewritten or removed, as the script will be more polished and in a more complete state.
3) Establishing the levels and scenes can save a lot of recording time, as they give context to the voice acting. Is the character in a battle, or is s/he in a calm environment? They had this problem with Liara at some point (may have been in ME3), and they basically had to re-record an entire section because the scene was changed from a calm environment to a battle environment.
4) You obviously can't hire all the voice actors at the same time. I think the average voice actor spends about 4 hours in the booth per day, so if 3 voice actors are scheduled on the same day that's 12 hours of continous recording. Now, I don't know how many booths BioWare have, but regardless, they can't bring in the entire ensemble at the same time. Of course, this can be mitigated by recording multiple actors in the scene at the same time, but that obviously doesn't work with all scenes.
5) Due to scheduling, some actors simply get pushed to the very end of the development cycle. It happens, and it's probably what has happened to Beattie.
I do think he's acting a bit apocalyptic about it by calling for a game boycott in order to get them to hire him. The critical journalist in me suspects that there might be an untold story to all of this.