Have they ever started running 4 trains again?
On my last 2 visits, it’s been running 3 and averaging a decent 700pph or so. I'd say it's mostly been no higher in throughput than Rita on my 2 most recent visits; occasionally on par or slightly higher dependent on how Rita was being operated on a given day, but quite often lower.
For some idea, I'd say that it's been averaging a 16 rider train about every 80-90s this year from my experience (3 trains, baggage hold open on all rides). Averaging ~80s on a fast set of readings (~720pph) and ~90s on a slow set of readings (~640pph). Think a similar sort of interval to the interval that Wicker Man dispatches 24 rider trains at.
The baggage hold returning does seem to have helped matters somewhat. I noticed that when the flow of trains was constant with the baggage hold open, the dispatch interval was barely over a minute, and had that constant interval been maintained over the hour, the throughput would have been a bit over 900pph. The thing that kept the throughput at 700pph or below was the fact that the staff were often having to wait a good 30 seconds or so for a train to return to the station.
From my experience, the main queue has seemed fairly long for it on my two 2022 visits; I once saw a 110 minute queue, and I quite frequently saw it exceed an hour.
I do think that returning the 4th train would help matters even further. When I timed the throughput in 2021 (4 trains, baggage hold closed), it was averaging a train roughly every 75s (~768pph). And that was with the baggage hold closed; I reckon it would comfortably exceed 50 trains per hour (800pph) with an open baggage hold and 4 trains, possibly even edging towards 60 trains per hour (960pph) on a good day!
Did Smiler ever hit 1,000pph under the way Towers operates it? Gerstlauer claims it's capable of 1,200pph, but this is with 5 trains, and I'm guessing it could also account for a separate offload area, which Smiler does not currently operate, but looks as though it could well have been originally designed to operate.