Ow.
It seems like a better option to wait for the 5700. The generic PC Cards won't drive the internal Thunderbolt ports.
It would just be a shame if Apple got the 5700 MPX module out just in time for AMD to drop a 5800.
It wouldn't be a shame ... .it would be consistent ( "dog ate my homework" event. )
We'll see. I suspect though that AMD will start the RDNA II rollout out up above the 5700 though ( to help give it a full 12 months in its price space. ). The successor to 5700 would be 6700 or 5702 ( where either a prefix or suffix update). "5800" is probably going to be in a higher space than entry mid-range price point.
But yeah their entry card is SNAFU. The affordable upper mid - low high, range pricing is beyond SNAFU.