Without internal weapons bays, it's going to suffer immensely in terms of RCS.
I don't disagree, but I think that it may not be terribly problematic anyway.
There is one truth of CCAs (at least looking at the types people have come up with thus far) that is apparent to me:
A stealthy CCA isn't going to be amassable and amassable CCA isn't going to be exquisite or extremely stealthy. If CCAs aren't going to be extremely stealthy anyway and they are too small to be easily stealthy, being less stealthy isn't going to matter because we aren't in 1v1 a CCA joust here.
If we just think about CCAs like conventional fighters - sure better signature management and IWBs would obviously be great, but looking at it from an enemy's point of view and considering an air to air engagement as an example, in the broad scheme of things a CCA is the last thing you'd want to waste your limited weapons on unless you are being directly threatened by them (even if you are a J-36). You'd be able to detect them a lot further away than a manned platform and if you were the Chinese, sure you could plink them from way out of range, but would you want to waste your limited armaments in your IWB on unmanned assets when the real targets are the manned platforms behind them? If you choose to engage, you might well find yourself being shot at from multiple angles by both manned and unmanned platforms while you yourself have not guaranteed a kill on the CCAs let alone the unmanned aircraft behind them. On the other hand, when you evade, you'd have to be careful not to put yourself in range of another CCA.
On the flip side, having a flight or two of CCA's spread out across some 20 - 30 nm (or more?) area would present enemies with a lot of dilemmas even if you are less stealthy and obligated to smaller sensors. You might be able to rely on multi-static returns illuminated by other sensing platforms to present targeting solutions from a wide variety of angles over a wide area even if you yourself cannot detect the enemy yet with your own sensors. You might have EO systems that can be cued by a more powerful off-board sensor too that offer better range than radar against a stealthy target. You'd also be able to constantly degrade the EM spectrum via jamming from multiple sources. Because of all of this, its much harder and much less profitable for your enemy to attack you while it offers much more options for you to attack them. That's why I think having mass and high sensor integration is a lot more important than being low observable (not that the latter doesn't matter of course).
Even in situations where you are up against a peer force who might have no qualms wiping out your unmanned assets - they would have to have to rely on CCAs or land/naval IADS to get the magazine depth you and your CCAs have. They can't be too stealthy or too exquisite or you won't have the networked resilience, magazine depth and sensing nodes to present as much engagement dilemmas against your enemies. Just having a stealthy and cheap CCA with IWBs isn't going to ensure you can shoot and also escape either against an enemy that isn't
that much more observable than you are. That's why I've seen very stealthy ISR UAVs that come in low numbers but the CCA UAVs from all over the world more or less take the same formulaic planforms and are much smaller in size. If stealth were as important for CCAs as we want to believe they are, we'd have to ask ourselves why so many flying dorito UAV's from the early to mid 2000's weren't considered for usage in this program. We'd have to ask ourselves why the Chinese, for all their manufacturing prowess, also passed up on making something like the GJ-11 by the thousands and instead also unveiled a very CCA looking CCA.
Again - being stealthy is important but not terribly so that something like the Fury may not be unfeasible - even with external stores. The fury would do fine especially as a sensor and EW CCA. Having said that - if I had to choose I'd still choose general atomics because affordable mass and gambit's flexibility is what I think really enables CCAs to shine.