It's not the worst play to create a scoring window, especially in the post-MWL world where Clone Chips are more scarce. But it's not Caprice, either. You can shunt Caprice over to the scoring remote early (even behind a single piece of ice it's very likely to work out to your economic advantage), whereas AggSec, with its 0 trash cost, will be a liability in your hand until you're ready to at least bluff the 5/3. Caprice helps keep your Adonises and 3/2s alive, can do real work on centrals against Keyhole/Apoc/Siphon shenanigans, and the synergy with Ash is phenomenal. AggSec is markedly less flexible and the combination with Ash gets a bit wonky*. Against rushy-Faustian decks, there's also a good possibility that AggSec has minimal impact on deterring the runner from repeating the run on the next turn. Whether those advantages are worth the 4/8 influence tradeoff at the deckbuilding stage is a judgment call, of course, but until Political Operative is legal there are very few in-game situations (read: virtually none) where I'd rather draw into an AggSec than a Caprice out of a Foodcoats shell.
*It's not exactly a nonbo, but it's not stellar either. If the runner makes it through to eat the AggSec, the entire server (including any Ashes) is likely cleared out, making a followup 5/3 a bit riskier. And there's always the outside chance that a previously-rezzed Ash actually saves the runner from AggSec if they take the bait but can't run the server twice/beat the Ash trace.