Cardiff and Newport have plenty of reasonably strong cricket teams. there is no lack of cricket in the capital.
In Wales i just dont think the system is strong enough to stand on its own. There is no sustainable model of clubs bringing in money, to support a structure for a national team. Ultimately i do not think the desire in Wales is there from the population to support cricket (outside what is already happening).
Cricket in Wales is bigger than baseball at the moment, i don't think baseball impacts on cricket at all in Wales.
With regards to International Matches in the SSE, people need to realise that its not filled with Welsh people supporting England, a lot of people come in from England who see Cardiff as more accessible than some of the other test match grounds.