I think the pump from the first halving should be treated as an outlier when talking about average increase. We'll have a more realistic expectation if that's remove from the computation.
In any case, the percentage increase in this 2024 halving could be the same as the third or a bit higher. BTC at six digits by late 2024 or early 2025 is still not out of the picture.
I think everything is normal and reasonable, including the entire BTC price fluctuation in each cycle. BTC's price performance is hindered by price, marketcap, and ALTS participation. This means that the increase of BTC price will slow down over time, until there is a major change in the price regime: from convergence to stability to a larger bubble.
I am very optimistic about the impact of BTC Spot ETF but I do not think it can change the current regime of BTC: meaning that the price performance of BTC in this cycle will be smaller than in the previous cycle, meaning that using the connecting line of the 2 peaks of the 2 previous cycles cannot help suggest the peak of the next cycle.