Long term plan:
Relaunch Silkcoin using the same codebase as DarkSilk but on ClearNet, no Stormnodes/Masternodes, no SandStorm/DarkSend, no InstantX and no decentralised marketplace.
Complete swap from old Silkcoin to new.
New Silkcoin will be able to be used with the Weaver to swap for DarkSilk the same as the old Silkcoin.
Yes i think ultimatley swapping all silkcoin for drkslk in the long term is a good idea.

I think the consensus is that Silkcoin won't actually be ever completely swapped for DarkSilk as PoS will continue and also new systems and services will come available for Silkcoin.
Saying that, what are peoples thoughts?
Binary-Coin-System is the way to go. It creates a unique oppertunity for Silk next to DarkSilk to store and hold value. It's price will be safeguarded by DarkSilk through the weaver, but still it has infinite room for upwards speculation. On the otherhand DarkSilk will end up being the coin of use and drive the price upwards through proven intrinsic value i.e. its usability.
Users will prefer DarkSilk
Investors willl prefer Silk
The coins will automatically converge into these roles by this setup. It is very exciting to see them seperated in the Silk project. To swap all, or to do away with Silk will destroy this oppertunity.
In my opinion it would be best not to introduce any services to Silk at all, leave it as bare and clean as possible. With all the bells and whistles going to DarkSilk. Silk could be the shinging white, dare i say "innocent" coin that stores value for investors in the brand Silk like any other commodity.
edit:
Ideally in my eyes DarkSilk should have a restricted increase of supply, much like a flat rate. This would provide a linear increase.
While Silk could have compound interest, slight exponential increase. The two intersection points would create a nice area for swapping, just an idea

If people want to use drkslk why wouldnt they just buy drkslk? Why buy silk and convert to drkslk?
Precisely. Unless they are a holder of Silkcoin already...
or
Silkcoin and DarkSilk purposefully do not share merchants and services so that there is more of a need to swap between currencies/assets...
or
Weaver runs for a limited period as a swap system for Silkcoin and then evolves to an exchange between more reputable cryptographic currencies...
or
something else I cannot think of right now... :p
EDIT: Weaver could also run in conjunction with the Cystum multipool, to provide the swap system for the coins miners select to be paid in for their mining efforts.