Linux/Win 10 Dual boot hdd setup

Operating Systems & Open Source Linux
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Wall of text warning :)

TL:DR - Linux on fast hardware XFS + win on slow make sense?

For the past two years or so I have been dabbling with Linux, and had decided to migrate away from Windows, but so far I have been procrastinating. Now the time has come to make the swap PERMENANTLY and this is my game plan for doing so. Feedback Is appreciated.

HARDWARE

I have 3 hdd's in my system. In order to make this easier on myself - I have copied ALL my data to external drives so that all 3 drives can be wiped.
I have: 1 x 250GB Samsung 840 Pro ssd
: 1 x 3TB Seagate 7200 rpm hdd
: 1 x WD 750GB 5400 rpm hdd (laptop hdd)

Right now the ssd is my Win boot drive, the Seagate is my games/media drive, and the WD is my Linux drive.

Proposed setup is going to be: Win 10 installed on the WD, and when this is done it will be the only drive in the system, as Windows likes to break grub when installing.

When the Win drive is done, the SSD will be connected and openSUSE 42.2 will be installed on it, and the Seagate will be connected after.

The SSD will be formatted as XFS for root and home - I thought I would use 40GB for root, 10GB for swap and the remaining 200GB for home(rounding numbers for simplicity)
The Seagate will be formatted as XFS as well. I know openSUSE uses btrfs by default but from what I have been able ot find out, XFS is faster, and I dont think I'll need the snapshot feature from btrfs anyway.
If this is dumb - chime in! Perhaps btrfs for root and XFS for home is smarter?

I also have found replacement Linux programs for everything except 1 game and Skype - so that is why I still need a Win drive - otherwise it would be linux only. But the idea here is to boot into and use Linux 99.9% of the time. The game is The Division - which will probably never make it onto Linux, and Skype, because A) I need it for talking to my kids - and B) according to the Arch wiki, the Linux version of skype still sends encrypted traffic even when the program is not in use. Skpe Alpha may change this, but its not ready and its also likely to data mine for microsoft anyway.
Before anyone suggests it - I cant use an alternative to Skype. I know there are viable alternatives (like Jitsi) out there but its a complication I have no control over.

Thoughts?

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Why not put both OS on the SSD, then install GRUB on the same location as windows boot manager? This is what I do, and it allows me select between GNU/Linux Mint and Win 10 from GRUB. Also, I have had this setup on my Alienware 17 for a year, and I have even updated Win 10 anniversary edition, and then to the creator's edition, and it has never broken GRUB.

You can then use both HDDs as storage...

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The reason I wasnt going to do it that way was because I want to get rid of windows entirely. If I keep the two OS's on seperate disks then its easier to get rid of one later on. If I get to the point where Skype is the only thing I need, then I would do that inside a VM in linux.
If i keep playing the Division long term, then when I build a new PC, I would only buy parts that facilitate a gpu pass through setup, and again have the Win install as a VM in Linux. Probably when Zen is available I will go down that route unless its crap, then it would be 2011-3 or similar.

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The getting rid of bit makes sense to me!!

Although I don't know how well games play with GPU pass through and in VM! I don't game that much.

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Well (slightly off topic) if you were interested in finding out, one of the forum regulars has a YT channel where he has specifically done things like teset passthrough performance.

You should check it out.