A default setting is a reasonable gamble for initial testing, an extremely limited selection of options is dumbing it down a bit, and ignoring GPU and display data altogether is outright deficient. It may not be the highest priority initially, but it should be addressed. It's an indicator of 8-) distro maturity. A small initial selection should be expandable to anything the GPU can reasonably be expected to put on the display.
Getting all this built into an ISO should be a long-term goal; in the short term, DIY method(s) need documentation (url? wiki?).
Access to display settings, esp. resolution, should initially be available from anywhere on the screen. That's basic UI design.
[edit: replace "polish" with 'maturity']