Sort of, tested it and she can no longer benefit from magic damage amplification when she has Aghanim.
Yeah I considered that a straight nerf tbh. Yeah it's pure damage, but eblade/veil no longer works on her :[.
Although I guess it brings up a good tactical point. If you're a poor support, going for aghs is probably a better choice unless you really think you can afford the buildup to eblade and benefit from it, and with eblade no longer putting you ethereal except on self/ally cast, it makes even less sense to get as a support. Being able to deal a huge amount of damage to that enemy carry under BKB or potentially kill a dangerous but flimsy teamfighter like Enigma or CM is a valuable skill to have. I mean, with aghs essentially anyone under 950 health is dead, period. Plus with the gold change she can get much more farm now from the kills she's going to net, making her a much more viable position 4/5 low farm support.
Honestly eblade only makes sense if you're playing carry Lina and have other INT items to abuse like hex/etc. Orchid damage amp should still help since it applies the +30% at the end instead of lowering magic resistance. Veils I tend to get on her anyways since it's a great support item period and it's a great item for her to boost her nukes + any other nukes the team might have. If you end up solo mid generally the time to get a veils is a lot quicker than carries would get BKB up, letting you get a LOT of easy kills. I tend to even get it before force staff/blink since it amplifies your combo so much before enemy health pools start getting outrageous.
If you're a support Lina, after arcanes, veil isn't that much of a reach and while she's an OK mek carrier, you'd probably want one of your cores to get it since they can get it a lot sooner. And even if you have to delay it to get other items like force/blink/etc, it's not like a veil loses its effectiveness over time. If anything having a veils is probably a necessity now with magic resistance being stackable now.