Games Workshop is pretty invested in Age of Sigmar taking off, but Warhammer Fantasy never quite hit the same success 40K did (hence the reboot). I guess the biggest concern with that game is that the factions are very... Balkanized? and that makes it look like a recipe for factions getting Squatted to me. If you stick with something they're invested in (e.g. Seraphon, Sigmarines, Chaos) you should be OK on that.
@ kingv - Saw you were exposing your daughter to Kill Team in the Dungeons & Dragons thread (iirc). Don't have a lot of practical advice there but I got into the hobby as a kid via the streamlined large scale battle boardgames like Battle Masters. My first proper 40K fight was relatively small, though. The question I have about the tactical games now is are they just 40K with fewer units (good) or pandering to Necromunda dorks (good too, but maybe not for kids).
I’m not really familiar with how necromancy actually plays, so can’t compare kill team to it easily.
I also don’t pay full 40k.... however, I have some familiarity with the rules (I.e. I own the rule book and have talked to people that play it).
With this things in mind, from what I can tell, killteam was a is somewhat similar to the full fat Warhammer rules, but brought down to an individual unit level. Charge rules are basically the same, the phases of the round are basically the same, how you resolve hits are basically the same, and unit costs are basically the same.
My biggest criticism of Kill Team is that it plays somewhat slowly. Sometimes it feels like you roll
20 dice to determine that nothing happened. If I were to design it from scratch I would streamline the hit/wound/save/injury dynamic.
Other problem is that a lot of people get confused with how the rules work. This is drawn from the way the the rules are written for shooting. The rules are written so that if you shoot 4 times, each shot is resolved individually but everybody rolls 4 dice at a time because it would take too long. Then there is a mechanic to reroll dice, and it can be very confusing for people to understand when you reroll one die vs when you reroll all of them. The injury roll, for example, is one roll even when it is 3 dice so you would reroll all 3, but the roll to hit is 3 individual rolls that you are rolling at once to save time.
Other problem is dealing with people that are super annoying about the obscurity rules.
I wouldn’t really say it’s “for kids” when I play with my kid, I basically trim it to move and shoot and streamline the modes so there aren’t many options.