After building the Valor of Cid, is it possible to complete the other 2 and unlock all the features? Do I have to go to a new map for that?
hmm not sure with the debug tools but for that you have the reembark
Edit: like Milaga said after this post and just adding the following:
re-embark will only carry recipes from Ascendancy -> Ascendancy and Rayyas -> Rayyas.
Ascendancy -> Rayya or viceversa are not possible… (unless they changed it)
If it helps, re-embarking allows you to carry over recipes. You should be able to craft everything if you re-embark. I just started a re-embark and I can craft the legendary weapons and the unique decorations from my previous run.
I know this might seem dumb but how do you re-embark? The menu came up, I chose my people and items and hit ok and then the menu went away and I’m in the same town with 3 less people.
When you start a new game, you can choose the people that you sent off to be part of your new initial roster.
The way it works right now is that you have to choose one of each tier 1/2/3 upgrades, and then start a new game to pick different ones. However, you can do the Re-embark thing, as mentioned, and eventually get all nine of the effects in your third town 
Maybe I should add an easy debug tools way to add the town upgrades, though…
Oh wait, so when I re-embark heart and monument will follow me? But I can pick only banner
If you take the hearth, monument, and banner from your previous town along with you as part of the 10 selected items then they will, apparently, retain their magical effects. I haven’t tried it myself yet, but a few people have talked about carrying over their banners and hearths already. I haven’t found a way to un-deploy the banner or hearth though, so I’m not sure if it works with deployed items or there’s something else I’m missing.
What I’m really interested to know is whether we could stack multiple of the same effect, either through carrying across the same item and repeatedly selecting the same upgrade (e.g. acquire 5 Banners of Vitality), or else through selecting the equivalent paths across all three kingdoms (e.g. take the Fountain of Plenty, and the NA and RC equivalents.) Of course it would cap out with the 10 item carry-over limit, but just imagine… +10 to all hearthling base stats?! All plants getting 20x their appeal value (bringing your humble brightbells and frostsnaps up to the level of some of the top-tier decorations at their base quality)?!
In stonehearth/services/server/town/town.lua, the function Town:add_town_bonus checks to see if the new town_bonus_controller_uri is already applied. If it is, its reference count is increased, but an additional controller is not added. So the effects won’t stack, but if it’s being applied by multiple sources, it will continue to be applied until all sources remove it.