"additionally complicated" is a correct and usable phrase in written English.
It can be used in contexts where you are adding complexity to a situation. For example, "The situation was already complicated, but then his involvement made it additionally complicated."
The attack signaled how India-Pakistan relations had become additionally complicated by India's expanding presence in Afghanistan.
In the last several months, the shifting equation between the two Clintons has been additionally complicated by another element.
The task of the QoS satisfaction is, however, additionally complicated by the multi-hop nature of the transmission process.
The incident was additionally complicated by a midgut volvulus with diverticulosis in full length of the small bowel.
Answering these already complex questions is additionally complicated by the existence of new technologies that make possible multiple ways of becoming a parent.
The situation is additionally complicated by the fact that the ease of synthesis for a particular molecule is not a constant.
This additionally complicates detection of false attestations of demand.
Besides the non-stationary motion, another major problem is the non-discriminative texture information of the lower leg landmarks (cf. landmarks 12 to 15 and 19 to 22 in Figure 1b), which additionally complicates the fitting process of AAMs.
While in previous applications of DCP in the area of power control[37, 38] the problem was in fact solved as a concave minimization problem over a convex constraint set, we have additionally complicating DCP constraints in (26b).
This situation additionally complicates the fact that the Polish president was headed to Russia to commemorate a mass murder of Polish officers during World War II by the Soviets in Katyn, "a cursed place" as the former President of Poland Aleksander Kwasniewski has described it.
Interdependencies and reciprocal role responsibilities additionally complicate disease management but differently for patients and spouses.
