Slightly more complex moulding or more complex PCB being too expensive? I don't think so. Those couple of pence is not the reason why Google devices (phones, tablets) no longer have SD cards. This is about removing choice to try and promote cloud storage.
And like when Oracle tried to remove choice by promoting Network Computers, or as Apple keeps doing with their stuff, I and lots of other people will not buy something where choice has been removed.
Unfortunately, lots of other people will buy stuff with built-in obsolescence as can be seen by the continuing popularity of Apple stuff. Some people either don't care or are willing to put up with anti-consumer things like soldered-in batteries. I know that all electronics I buy will become obsolete far too fast, so I avoid anything which deliberately makes that even worse.
So, yes
IMO any phone/tablet without SD card slot is not for me.
If anyone else is also worried about this trend, check out ifixit.com's Self-Repair Manifesto:
http://www.ifixit.com/Manifesto
Unfortunately, probably a loosing battle but that's no reason to give in without a fight.