[2019] It seems weird that skills with tons of uses already get 120s while skills with almost zero use, like construction, get nothing for years

Originally posted by I_Kinda_Fail

Plenty of ideas myself, but balancing and deciding whether it's worth making is a whole other beast.

For example, they could add upkeep to the house for free ways to train various skills. Water your garden for a bit of free Farming XP. Feed your pets for Summoning XP. Tidy up the kitchen for Cooking XP. (Or hell, even season a pot once a week? I dunno.) And just give an option to turn off house upkeep by having the butler do it, so players who don't want their homes to look filthy can do it themselves. I'm thinking something akin to the Mazcab forest, where you run around and get a bit of XP across like 5 skills.

Obviously they could add more rooms like the aquarium. Add a Thieves' gallery that gives perks for each unique piece of art of heirloom stolen. Add a greenhouse for Farming that has its own loading zone like the aquarium, and let us have a few allotment, bush, flower and/or tree patches in there. Add a proper trophy hall that gives minor buffs to Slayer, Fishing and Hunter by mounting various trophies. (For example, a mounted Bagrada Rex tooth would give you an extra second before being caught in BGH, while a kyatt fur rug would save logs while catching those beasts.)

Completely rework portal rooms. Have the tier 1 portals act the same, the tier 2 portals unlock Lunar and Ancient teleports, (maybe not the Wilderness ones?) and have the tier 3 portals cover entire kingdoms. Make the portals require less upkeep than the items themselves - so for example, 100 Falador teleport casts would last for 500 teleports. Add the lodestones to the portals via a vis wax payment, jewelry teleports via teleport compactors, etc. Players will still have to recharge them every now and then, but less often than using the items from their inventory. Add slimmer portals, like the ones used at the beach, rather than the huge 3x1 portals we have now. Let players add a boss portal and a favorite D&D portal. Finally, allow the option for house teleports to teleport you to the portal room instead of the house portal.

Add a bonecrusher to the chapel room, with each tier being able to grind a set amount of bones per day, for players who prefer the ectofuntus over the gilded altar.

Let us add monsters via the Slayer pokedex to our dungeons to make it more challenging.

Let us store noted raw ingredients in our kitchen, and change the kitchen's utility entirely. For example, an oak larder could hold 100 raw fish, but a mahogany one could hold 500. Have food cooked in the house get a 5% experience buff, and the "Home-cooked" prefix, making it untradable, but heal you for 10% more. This takes the fish off the market, and rewards players for cooking their own food.

Add an Invention workbench to our workshop.

Add a brewery to our study, replacing one of the bookshelves. Have it work like the kitchen does, but for Herblore, holding supplies and acting as a free portable well, maybe with limited charges per week. Let us "experiment" on herbs in the brewery, consuming the herb and giving experience similar to normal training rates, but without giving anything but experience. The idea is to make Herblore training more AFK at the cost of gaining no potions or supplies to sell back.

Have our prayer altars and summoning obelisks overload our points in those skills.

There's TONS of ideas that could be done with the POH. Whether they actually implement any innovative or useful rewards is up to Jagex, though. But if I can come up with like 5 ideas off the top of my head at 6 in the morning, I'm sure asking the entire playerbase for suggestions would produce much better ideas.

And, as someone else said, they could just copy some of the stuff OSRS did, like the garden having a spirit tree, fairy ring combo. It wouldn't be the first time an Invention item had the same utility as something else. (Sprinklers vs white lilies)