The artillery rework set out to fix the issue of artillery being uncounterable and the largest calibre you have being the only one you would ever want to bring.
It attempted to solve this by adding the set-up and pack-up timer but made it too long at 25 seconds (excluding mortars) and by applying it equally across all calibres and types. This made artillery too easy to counter-battery, ruined their damage output and ruined the gameplay of microing artillery as now it is completely irrelevant. It also ended up making 203mm even more dominant than it was before as only it has the range to stay outside of most enemy counter-battery.
To make the artillery rework solve the problems it set out to solve I propose the following changes formed through my own thoughts and opinions I've gathered from talking to people in the community.
Set-up and pack-up times:
These need to be dependant on calibre, veterancy and whether the platform is towed or self-propelled.
Paying the premium of being self-propelled should give you shorter times so that you can be safer from counter-battery.
For calibres I propose that guns ~120mm don't receive any set-up and pack-up time incentivising them to be used as quick-response fire support (and just to be used in general).
Calibres ~150mm should have a set-up and pack-up time of ~3-5 seconds to let them still do their fire support as they did before the rework but with a marginally lower total damage potential over the entire match and a chance of successful counter-battery if the opponent micros their artillery but you don't cut your salvos short.
Calibres ~203mm should have the longest set-up time at around 10-15 seconds to lower their overall potential damage output incentivising using smaller calibres for things like ATGMs and MANPADs and making them more vulnerable to counter-battery and flanking units as well.
(I also think the standartisation of artillery should be reverted as it ruins variety)
This would make artillery much better