If we launched Monero today, we definitely wouldn't choose 1 minute for the blocktime. Why should we be stuck with it now? Because "we don't change important parameters in a working system"? I reject that wholly presently (for non-"social contract" stuff). If Monero grows, changing stuff will definitely get harder (rightly and reasonably so). We are nowhere near there yet. While we have the freedom to change stuff like this for the better, I think we should definitely go for it.
For the minimum median size, it's basically a bandaid, sure. But this bandaid will help out payment processors and users significantly in these early days of low, low usage, with very little (or no) obvious ill effects likely to arise. If transaction use rises to moderate use, it'll become almost entirely irrelevant anyway. There's even a possibility the blocksize adjustment algorithm could be changed to something significantly different (but better!) later.
Back to blocktime: this was another "genius" parameter chosen by TFT that basically no one agreed with. It was, and is, subpar. Fortunately, unlike the emission, nothing prevents us from changing it to something better (anything longer within an OOM or so being better). 1 minute confirms aren't "fast", nor are they secure since reorgs happen very frequently. I think you mentioned something about reorgs being fine because transactions will probably be confirmed on both chains. This is irrelevant because honest transactions you trust to "be there in both chains" you can trust even before they're in any chain. 1 minute blocktime is also a significant pool centralization pressure (much, much more than Bitcoin's configuration, and we know how much people talk/worry about that); it's almost like purposely encouraging it.
I do agree that "less coinbase transactions" will be mostly meaningless if usage takes off, but that doesn't mean it isn't beneficial now, when usage is low. It's kinda like this Satoshi quote: "It would be nice to keep the [blockchain] files small as long as we can. The eventual solution will be to not care how big it gets." Less blocks/coinbase transactions will certainly be beneficial now, allowing faster syncing/better experience for new users/etc, which may even be a contributing factor to increasing Monero's usage to the level that it's irrelevant!