I have to disagree, the main marketing point for BTC economy is it's capped 21M
Equally important to bitcoin is "be your own bank" and that you have completely sovereignty over your own wealth. This ceases to the case if a small group of developers decide to start siphoning off some of your coins against your will.
assuming the other other ideas like merged mining don't work, which would be very likely anyway.
Why is that very likely? The majority of blocks which are currently being mined already take part in merged mining via the likes of RSK.
That is not very accurate, your store of value will not be worth "less", you would have "less" of it
The outcome is identical - I can now purchase fewer good or services with my holdings. It doesn't matter if you take away 1% of my holdings as tax, or you devalue my holdings by 1% by printing more. Either way, the amount of goods and services I can purchase with my holdings has been decreased by 1%.