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Understanding properties of Quark-Gluon Plasma requires an unbiasedcomparison of experimental data with theoretical predictions. To that end, wedeveloped the dynamical energy loss formalism which, in distinction to mostother methods, takes into account a realistic medium composed of dynamicalscattering centers. The formalism also allows making numerical predictions fora wide number of observables with the same parameter set fixed to standardliterature values. In this proceedings, we overview our recently developedDREENA-C and DREENA-B frameworks, where DREENA is a computationalimplementation of the dynamical energy loss formalism, and where C stands forconstant temperature QCD medium, while B stands for the medium modeled by 1+1DBjorken expansion. At constant temperature our predictions overestimate $v_2$,in contrast to other models, but consistent with simple analytical estimates.With Bjorken expansion, we have a good agreement of the predictions with both$R_{AA}$ and $v_2$ measurements. We find that introducing medium evolution hasa larger effect on $v_2$ predictions, but for precision predictions it has tobe taken into account in $R_{AA}$ predictions as well. Based on numericalcalculations and simple analytical derivations, we also propose a newobservable, which we call path length sensitive suppression ratio, for which weargue that the path length dependence can be assessed in a straightforwardmanner. We also argue that $Pb+Pb$ vs. $Xe+Xe$ measurements make a good systemto assess the path length dependence. As an outlook, we expect thatintroduction of more complex medium evolution (beyond Bjorken expansion) in thedynamical energy loss formalism can provide a basis for a state of the art QGPtomography tool - e.g. to jointly constrain the medium properties from thepoint of both high pt and low pt data.

Dynamical energy loss formalism: from describing suppression patterns to implications for future experiments