Q#1. PCs leveling up: You can only raise skills, or gain a new skill/talent, but there is no way to increase an attribute or health/hit points?
Yup, only you can only increase skills and take new talents with xp (and gain new mutations).
Q#2. Ark Projects: How long does it take to complete an project, as measured in Work Points? (If you have six PCs, and a lot of lucky rolls, you can get a cropland, workshop, or harbor built within a few days; that seems WAY to fast to me.)
Game time is abstracted for these meta-gaming tasks. So when your players work a on project, weeks or so may have passed. When I played, I used a calendar and I assumed that two days to a week has passed.
Q#3. The example “Ark: Beached Cruise Ship” has not default DEV ratings or special projects built; considering that the game lore stats that this ARK is where the PCs have been living in for at least 20-30 years before the first session start (and obviously the ARK has survived all these years from monster attacks, environmental destruction, Zone-Ghouls raids…), how is it that nothing has been build by the NPCs during this time?
The sector has been fairly safe up till recently when the stalkers has been moving around more in the zone and more and more monsters and other mutants (from other arks and whatnot) have started to find out about the players ark.
Q#4. Role “Boss”, having a PC with his/her own gang to start with sounds like a nightmare for me as a GM to keep track of in the party and during fights; I am not sure this role is balanced for a new party.
Personally, yes it is a nightmare. It can work if you (and the player) are experienced.
Q#5. Role “Slave” reads extremely underpowered compared to the other non-Boss roles; why would someone that is not a method actor voluntarily take this role when there are clearly much better options?
His specialist skill (Shake it Off) makes him extremely good. So good in fact that when we played I didn't allow anyone to play slave.
Q#6. Roles; are there more roles in the other Core Rulebooks (GLA, MT, E), that can be used in a starting MYZ party?
Yes there are five new roles in GA and six new in E. Mechatron has special rules for this since you play robot there. Besides the expansion campaigns (I have played them all), You can start a "normal" zone campaign with any or all of the expansion books in play. The last zone campaign we played, we started with animals and robots as available class options and of course the five animal roles.
Q#7. Zone travel: If a party has two stalkers, can the primary Stalker make the “Find the Path” skill check on entering a new zone, and assuming no stunts, look for artifacts, while the secondary Stalker can look for “Grub and Water” at the same time?
Only one stalker can make the normal "Find the Path" roll (the one you make when you enter the sector), but during the next four hour period, several stalkers can make the roll to get the Find the Path stunts that hasn't been found yet (you still can only get one stunt once per sector).
Q#8. “Session body count” it says to roll to see how many people in the Ark died at the end of the session. Is this a daily, weekly, or monthly roll? This is not clear.
Per session. Game time is abstracted in this game.
Q#9. There are references to a future sourcebook about “the solar system/in space”; what is the status of this book?
Ad Astra. They are working on it. We will get more information later this year about (hopefully).
Q#10. Has FL announced additional products for this RPG line; or is it dead/ended?
It is not dead (according to themselves). They have been said much where it will go next. So hopefully they will give us more news later this year.