Surely they can afford a $40 joystick from bestbuy or your nearest electronics retailer?! LOL
Although I agree with the sentiment behind ironing out control issues before launch, your follow-up statement reads more like a 'selfish' complaint.
Please dont take this as an attack of your post, as that is not what this is intended to be, however realistically the developers can do whatever the hell they want. If the game favours joystick control over mouse and keys, then that is how the game should be accepted... i.e. if you cant play it you may find the need to adapt.
Elite is far from a mainstream game - it is very much targetted at the sim crowd and should be considered as such. Its just a shame that right now the buy-in to determine if it works well for people is so high. That being said, it means only the enthusiasts are buying and imho if you can afford to pay in excess £100 for ANY game you can also afford to buy a £30 peripheral to really enjoy it... If people counter argue that they struggled to find the £100 to buy-in but still took the plunge, then that is you own burden to bare as there is always the option to wait and/or save.
Realist aside, I wish you all the luck in arriving at an optimal m/k configuration and hope that FD make an effort to improve the experience for those using this means of playing!