faucet can be profitable, depends on what amounts of profit are you looking for and what budget you have.
Low budget: you can create many simple faucets with low rewards and stay under adsense radar.
High budget: create one unique faucet with a good catchy name and new features, you will need to hire a coder and designer and there is also risk that adsense won't like it and ban your account.
What features are people looking for?
i think game style faucets are popular with upgradeable packages with different earnings levels, moonbit-like timer, at least 25% ref.commission, chat on site
Upgrades are very nice and excitant, but never works on long term because if everybody makes the desired upgrade the site collapses. Only works if the rates are possible considering the ads faucet income. But if it promises big upgrade returns better to don't risk.
Gambling can be a nice feature, but who really wants to earn some satoshi won't bet it to lose everything...
i was thinking about game-style faucet like those alien, robots and similar faucets, something what makes people to stay longer and earn upgrades and earn more over time.