I'll take a swing at it.
I don't particularly like lascannons in infantry squads. One could certainly make a case for them. In my autocannon/plasma gun squads I tend to issue 'bring it down' to them way more often than not. When shooting at light vehicles, lascannons average less results than autocannons but their ratio of penetrates to glances is vastly superior. Against T6
MCs with 3+ or 2+ saves, lascannons under 'bring it down' would outperform autocannons. Autocannons are the superior gun for all infantry firing. And they are 10 points cheaper. Ultimately, i wont stop you from running las/
plas on line squads, but I'm in love with the flexibility of
AC/
plas.
command squads need chimeras. They really do. You get two extra heavy weapons, you get protection, the range of your orders is increased and you can move them around to get their access to special weapons to bear.
I prefer my command squads to have meltaguns and be mobile in chimeras. They can fire all guns out of the chimera and stay safe, or if they want they can get out and issue themselves a 'bring it down'.
When I'm looking at where you've got your voxes, it looks like you might be planning to blob your platoons in every mission rather than only in
KP missions. I would advise heavily against that. the cool thing about voxes is that you can take one or two or three, if you want, and your performance will improve, but every unit that can take one doesn't have to take them. I think you should start without voxes at first, then figure out which units take the most orders, and issue them voxes first. Remember if you have units with voxes, issue their orders first, so you can re-roll a double 6's.
I don't particularly like the standard battle cannon, it is a little 'unfocused' for me. And I like to be able to move and shoot, so I prefer no sponsons.
If you don't mind I'd like to post a new list with my suggested changes. (revising a list is kinda like giving an actor a line read... you might really offend the person.

)
CCS regimental banner power fist 3x melta chimera 165
CCS 4x melta chimera 145
PCS 4x flamers 50
10man lasplas 85
10man lasplas 85
PCS 4x flamers 50
10man lasplas 85
10man lasplas 85
Valk
MP 130
Valk
MP 130
eradicator 160
eradicator 160
eradicator 160
This is a cool set up. you have enough orders to issue every line squad a 'bring it down' or a
FRFSRF, you have tons of meltagun support and only 13 kill points if you form up all of your squads. That is a low enough number for a mechanized army that I don't think you need to include the commissar. All this list has to do is have their infantry kill tanks, and have their tanks kill the infantry, and you'll be just fine. When killing those tanks and infantry try and kill the stuff that can kill your tanks first.
Let us know if you get in a game in and how it goes.