Faction immersion, general (not just FW):
- Tag mechs (including variants) for faction. Mech store should have a tab that obviously divides mechs by faction, on by default. Loyalists get discounts on mechs tagged for their faction. Mechs will have tags for multiple factions in many cases.
- On new skill trees, give discounts for loyalists in certain areas like electronic warfare and missiles for Liao, low caliber ballistics for Davion, PPCs for Kurita, additional armor/structure for Steiner, this kind of thing (someone who knows the lore better than me should take on the details). Also perhaps give overall xp discount for trees of certain weight classes like assaults for Steiner or just appropriate faction-tagged mechs.
- Give heavily discounted prices for faction (not permanent) paint color and pattern unlocks (perhaps for cbills even)--if you leave the faction you lose the color/pattern (mechs using loyalist colors and patterns without having paid for permanent unlock retuned to default colors/patterns). Make this more obvious for new players who don't notice the camo spec UI. Current price permanent unlocks still available.
Changing faction should require skill tree respec--points returned but if unlocks were done with discounts more xp will be required to re-unlock the same nodes.
Penalty for changing faction should be significant but not excessively prohibitive. Perhaps higher penalty for each variant owned tagged for current faction minus bonus for those tagged for new faction--insufficient funds means you may have to sell mechs or grind more to switch faction.
Faction immersion, FW:
- Loyalists have penalty for bringing mechs not tagged for faction. Perhaps restriction to one or two to drop deck, perhaps tonnage penalty.
- Mercs do not have this penalty
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tl;dr in many cases, especially with established players, nothing will change. But to some extent, when you see a pilot of a certain faction it becomes somewhat more likely that they'll be using a certain type of mech with a certain type of loadout with a certain color/camo scheme.