Yeah, exactly.... It may be a stop gap until they tweak the mechanic.
- Old coasters will attract lots and lots of guests
- Nobody of these guests is willing to pay for the coasters they came to the park in the first place. Well, okay, maybe a buck or two, the old coasters will still lose you money
- But if you place a new piece of scenery at the queue and paint the tracks green the ride miraculously is profitable again.
- And of course if you let your crappy old ride only sit long enough it becomes a classic and you can charge even more than back when it was first built.
- And it works like that for every coaster. Every kiddy attraction. All rides are the same.
How does this make sense to anyone? It's not like this in real life. As an idea to expand upon aging rides, ok. But to make the game harder giving us less money at the beginning of a scenario would be only slightly less interesting as ride reputation now.
I hope they develop real new managing features.
Researchable upgrades for rides would be where I'd start. Refurbishing could be a real thing: Not just chaning a color or click on a button that says "refurbish". Unlockable stuff like new track pieces, better brakes so you can have rides go faster, different cars with different properties (comfort, safety)... Of course that doesn't make sense for every kiddy ride but why should aging work the same for every ride? Through research you could unlock better (and more expensive) versions of flatrides (or just buy engine and capacity upgrades).
By different mechanics the way rides work could change over time.
Even the coaster stations could evolve. For your big coasters you could unlock new bigger stations. Those have a certain amount of staff slots. More slots filled of course means you pay more but by doing so you can boost safety, queue time/guest happiness... and of course your staff happiness is improved.
One of your old coasters in your park, a classic, isn't state of the art anymore, the old track system is unreliable, the ride breaks down a lot and is expensive to maintain. The catch would be, by tearing down this "classic" you upset fans and it affects your park reputation negatively. You would have to counter that by something like a press statement and announcing a new attraction in your park, a campaign for the grand opening....
This is just off the top of my head, there's a lot more things you could come up with to design interesting gameplay involving an aging mechanism. The thing it is right now is simply another variable added to every ride that changes over time. As a game machanic it's clumsy and unimaginative as can be.