I wouldn't read too far into it. There's already ways to uncloak people, and I guess the Angels (in fiction) are at least as resourceful as the players are ingame.
Also, it mentions
activity. If you are looking for something, you have to eventually drop probes. Which means you have to uncloak, get away from the probe, and cloak again.
I do not find it surprising that the Amarr would go into W-space systems with capsuleers around. If I were looking for something Capsuleers were not, I would send in recon ships to stay cloaked and let the Capsuleer forces in-system deal with the Sleepers and move in after the Capsuleers go away to look for what I want.
Again, AFK cloaking is one thing; actually
looking for something in an active manner is another. You are going to run into a situation where you are going to be visible, if only for a few seconds.
Think of it this way; the Amarr are already purchasing Sleeper tags, if they were in W-space it would stand to reason that they were looking for something Capsuleers are not looking for. Maybe they were looking for something small enough to fit in a handbag? You could even send in a "golden fleet" and have them spread out along the w-space flow network of wormholes, and wait until a system with something you may want gets used by a significant Capsuleer force.
You could even continue the process for quite a long time. W-space does allow for quite a bit of secrecy.
The capsuleers. They will settle. They will understand the network eventually, and they will command it.
They will not be everywhere at once, and we can move undetected.
In this environment, so can they. We are all headed to the same destinations. We have no desire to be noticed, and no hope in conflict with them.
Then we will use these early months well.
There's quite a bit of evidence (even official news stories from CCP) regarding Amarr presence in W-space. Mining expeditions, covert operations, CONCORD involvement in keeping things quiet....
Just pointing out that it's possible to connect the dots, and not read (too much) into potential changes in game mechanics. As a kind of storytelling, I love the quotes. Combined with the in-game events, I find it quite exciting!
We may not be able to fully interact with these events, but it is still something that is getting me to think and look at the potential storyline implications.