Won't this compromise privacy? You know, the major reason we always opt for a mixer is privacy.
Also, I don't think batch transaction will lower the fees dramatically.
Imagine a jump in the normal transaction fee rate from let's 3 sats/vbyte a few weeks to 300 sats/vbyte today... That's a 9,900% increase in fees
Anyways this is way temporary issue it seems.
Temporary, if the Devs and bitcoin community do something about it.
If the Devs do something about it... is the fees a function of having logs of transactions that clogs the network or some predefined fee. I guess it isn't the second and with that be the case, what can the Devs or community really do about the fee.
At this time, the fee seemed to have dropped compared to days ago when you can't even process your transaction with 100sat/byte. 50sat/byte could go from the last I checked around 14 o'clock forum time.
Still, it's a fee for a while and your drives to use them coins is the push to initiate transactions.
I don't see a way in which mixers can have it easier since, they use same network as the rest of the bitcoin community. Compounding coins comes with mo advantage as, the number of confirmations would play a role too.