Totally need a Tie Bomber and Slave 1 in 1/72 to go with all the others. What is the holdup on that ?
lot of things, actually:
1) houses in japan are small, so big kits arent popular (and japan corporations are looking at domestic market first)
2) in general kids these days prefer videogames over physical toys
3) even if they buy toys, completed kits are more popular than model kits that you need to put together and paint by yourself, modelmaking is dying hobby
4) molds are expensive and corporations are cheap, so more popular designs are taking priority
5) Thanks to Disney, SW isnt as popular as it used to be, so market for SW kits is smaller (oversaturation with movies, questionable quality of them, terrible job at dealing with the community after backlash, big licensing costs, making marvell the most popular thing amongst kids, etc)
etc.
Still hope for TIE Bomber because noone did it in the past, but i'm afraid that it might be too obscure for bandai, even ISD took them many years and one major scaledown before finally releasing it. It would be cool to get every SW kit ever in 1/72, but sad reality is that it's a constant fight to get anything new, so if I must to choose, I prefer to get something classic yet never released, rather than cheap modification of existing kits (falcon variants) or marketing push (ST kits that only fraction of Sw fans even care of. I know this community is filled with super-SW-fans, but reality is that toys of the older characters are more popular than the newer ones).