I thought I would try to collect popular ideas in one thread. Because I've noticed several important suggestions spread throughout the forums. I'll try to update this post as other suggestions people seem to agree on are brought up.
First is fairly obvious. Variable lasgun settings for all lasguns.
My recommendation would be to implement this, and then give the Triplex version a bigger bonus, for example Overcharge on a Triplex adds an additional 1 pen, and Overload does 1d10+5 Pen 2. Or something similar.
I would like to see the Bullpup get something special, the .5kg trade off for 1 less shot on burst fire and less range is not really equitable. My personal thought was and increase to the number of customizations it can have if it is part of the standard regimental kit. So normally a weapon can handle 4 customizations, the Bullpup could have 5. Also, the replacement of a lascarbine for an M35 Lasgun, should read "… with M35 Lasgun or Bullpup Lasgun." as the Bullpup should be an option during Regiment creation.
Also, including sunlight recharging of Las packs.
Failure with a grav-chute deals too much damage, I would change the test to Easy(+30) instead of Routine(+20), and decrease the damage to 1d10+ (1/per DoF), falling damage.
The Operate Skill is poorly formatted, its divided up like 3 separate skills when I believe it is meant to be a skill with 3 specialties.
There have been a lot of comments on Vehicles.
Given the current state of rules I would first recommend Changing the Pen of a Battle Cannon to 10. 8 obviously equates well with the TT, but since most Space Marines actually have 10 on their chest armor a 10 pen makes more sense. and Thus increase the Vanquishers to 20. and then simply have AP rounds provide a straight benefit, such as changing pen to 1.5X normal pen. I personally feel the changes should be far greater, but it would require redoing the profiles for both guns and the AP rounds section.
My 2 cents about the durability of vehicles. They are fine or at most require a small tweak. given that under the rules you can inflict multiple RF hits with one shot (a Lascannon could easily score a couple, and has a 50% chance of getting at least 1), which seriously damage vehicles. Also, destorying a MBT like the Leman Russ would normally be done with Lascannon teams, and idealy from an advantegeous position (side or rear). if a group of PCs is expecting to take down a Leman Russ with 1 Lascannon, then they are going to have a bad time. I am concerned with Melta weapons, they seem totally incapable of seriously damaging heavier tanks, perhaps a special rule giving them RF on a 9 or 10 when shot at a vehicle? or the Flame Quality? Typically they are powerful intense heat rays, and with the recent changes to Vehicles and fire combined with the Pen of a Mela weapon could make it viable for setting a vehicle on fire perhaps?
Finally, the Well Provisioned doctrine grants bonuses logistics for fuel and repair parts, but these mechanics are not present. nor is a system or GM guidelines for acquiring/assigning vehicles as specialty mission gear. adding a operating time/range, plus including guidelines for acquiring/assigning vehicles as mission gear could be very helpful.
Thanks for reading, hopefully this will help devs find a comprehensive list of changes.